Computing: Free Pascal Programming

My Free Pascal GUI Applications.

All downloads on this side are provided free of charge and without any warranty of any kind. You may use them as you like, but if you do so, it's entirely on your own risk! Please, have a look at this Web site's disclaimer for details.

Also note that I myself are not really a confirmed Windows programmer. I never made computer science studies and, even if I wrote my first programs some 40(!) years ago, concerning GUI applications, I only starting some years ago to develop graphical desktop applications. Thus, the source code on this side is nothing like perfect, sometimes (especially in the older applications) perhaps even "just as you shouldn't do", without the knowledge of all the possibilities, that Lazarus/Free Pascal offers and how to best implement them, also without care about file size and resources used. On the other side, I think that you can find here lots of inventive and interesting stuff, concerning all kinds of domains. I also could imagine, that people for whom, like for me, informatics is primarily fun, may consider the code on this site, as one between other possibilities to realize a given application, to modify it in order to adapt it to their own needs, to extend the program or to find ideas to realize their own applications.

These are GUI-based (graphical user interface) applications, running in a desktop window. The executables on this site have been compiled for a Windows 64bit platform; the sources of most of them should be suitable without greater modifications to create executables for Windows 32bit, Linux or Mac OS. Just recompile them on the platform where you want to execute them. If you just want to run the program, use the icon in the "Exec" column to download the executable (if it needs supplementary files such as data, these are normally packed with the executable in the .zip archive). If you are interested in the code or want to recompile the program (to adapt it to your needs or to use it on a different platform), use the icon in the "Source" column (the download file will be a .zip archive with all relevant files, NOT including any executables). To view a more detailed description of the program (including screenshots), click the program name in the "Program" column.

Program list:

Domain	Program		Language	Description	Exec	Source
Biology	Bacteria growth I			Bacteria growth on 1 substrate (extended Monod model)
	Bacteria growth II			Bacteria growth on 2 substrates (extended Monod model)
	Bacteria growth III			Bacteria growth in the chemostat (1 substrate; based on Monod model)
	Blood volume calculation			Determination of human blood volume (using 4 different calculation methods)
	Lung capacities calculation			Calculation of the lung volumes and capacities based on the values as read from a spirogram
		Muscle contraction		Tetanized muscle contraction graphs, using Hill's equation or cross-bridge kinetics models
	Point mutations			Molecular genetics: Simple point mutations analysis and exercise generator
	Predator-prey model			2-species growth simulation: Predator-prey model (Lotka-Volterra)
	Predator-prey model II			3-species growth simulation: Predator-prey model (Lotka-Volterra extension)
	Renal physiology			Renal physiology: Calculation of glomerular filtration rate, renal blood flow and filtration fraction
Chemistry	Acid-base reactions			Chemistry trainer (exercise generator): Mineral acid-base reactions
	Amino acid statistics			Protein analysis: Amino acid count by the similarity groups defined within the various classifications
	Atomic structure			Graphical representation of the atomic structure of uncharged and charged isotopes
	Electron configurations			Electronic structure of atoms and ions (electron configurations) exercice generator
	Diffusion			Simple simulation of Fick's Law of diffusion
	Ideal Gas Law			Graphical application about the laws relating volume, pressure, temperature and quantity of ideal gases
	Molecular weight calculator			Determination of molecular weight of standard molecules, oligonucleotides and proteins
	Stoichiometry exercises			Chemisty trainer: Generation of stoichiometry exercises: Balancing chemical equations
Computing	Local MP3 search			Search MP3 files on local computer (serach criteria based on file properties or MP3 tags)
	Network tools			Graphical user interface to run common MS Windows network command line tools
	Directory lister			Directory listing with export functionality to text, CSV or HTML file
	File associations			Creating Microsoft Windows file associations
Education	Bird quiz			1-/2-player bird quiz with 5 levels + slidshow of the 120 included pictures (German and English bird names)
	Carnivore quiz			1-/2-player carnivore quiz with 4 difficulty levels + slidshow feature to display the 100 included pictures
	Chinese characters			Learn to recognize Chinese characters and their meaning
	English verbs			English grammar trainer: Simple past and past participle of regular and irregular verbs
	Europe quiz			Guess the capital, country surface, inhabitant number, EU entry year or flag for a given European country
	Flag quiz			Guess the country corresponding to a given flag (country names in English or German)
	Flower quiz			Multiple question-types flower quiz
	French adjectives			Languages: The suffixes of the French adjectives
	French nouns			Languages: The plural of the French nouns
	French nouns II			Languages: The feminine of the French nouns
	French verbs in -er			Languages: Conjugation of French verbs in -er
	French verbs in -re			Languages: Conjugation of French verbs in -re
	German verbs			German grammar: Conjugation of strong and irregular verbs
	Greek alphabet			Learn the Greek alphabet (Greek letters)
	Hebrew alphabet			Learn the Hebrew alphabet (Hebrew letters)
	Latin declensions			Languages: Declension of Latin verbs and adjectives
	Learn the alphabet			Educational application for children: Learn the alphabet (English and German letters)
	Luxbg. cantons & townships			Quiz: Guess the canton, inhabitants number or ward of the Luxbg. townships; guess the canton emblems
	Luxembourg locals			Quiz: Guess the local name, township, canton, or part of the country (ward) of Luxembourgish locals
	Luxembourg rivers			Quiz: Guess the source and destination of the 15 main rivers in Luxembourg
	Luxembourgish numbers			Basic arithmetic with numbers in luxembourgish
	Luxembourgish verbs			Languages: Present tense (Indikativ Präsens) of luxembourgish verbs
	Luxembourgish verbs II			Languages: Participle and compound tenses of luxembourgish verbs
	Sequence of tenses			French grammar: Indicative and subjunctive; sequence of tenses
	Roman numerals			Roman numerals conversion and knowledge test
	Russian alphabet			Learn the Russian alphabet (Cyrillic script letters)
	Ungulates quiz			1-/2-player ungulates quiz with 4 difficulty levels + slidshow feature to display the 90 included pictures
	USA quiz			States of the USA quiz: Capitals, inhabitants, USA accession years, flags, seals
	World countries quiz			Guess the capital, land area, country and capital population of the world's countries
	World rivers quiz			Guess length, drainage area, discharge, outflow, continent or drainage countries of the world's longest rivers
Electronics	Transistor amplifiers			Electronics calculator and exercise generator: Simple transistor amplifier circuits
	Binary adders			Electronic circuits: Using logic gates to make binary adders
	Binary multipliers			Electronic circuits: Using logic gates to make binary multipliers
	Binary subtractors			Electronic circuits: Using logic gates to make binary subtractors and adder-subtractors
	Capacitors			Study of voltage and current during the charge/discharge of a capacitor
	Combinational circuits			Logic gates based electronics: Combinational circuits simulation
	Diode circuits			Simple diode circuits: Essential values calculation and exercise generator
	Logic gates			Electronic circuits: Simple interactive simulation of logic gates
	Logic gates II			Electronic circuits: Simple interactive simulation of XOR gates made of circuits based on Boolean algebra
	Multivibrators			Electronic circuits: Simple interactive simulation of transistor-based multivibrators
	Ohm's Law			Electronics trainer (exercise generator): Ohm's law in simple, series and parallel circuits
	RLC circuits			Electronics trainer (exercise generator): RLC circuits
	RS and D-type latches			Electronic circuits: Simulation of various RS and D-type latches
	Standard resistors			Determination of standard resistor values based on the resistor's color bands
	Operational amplifiers			Common linear and non-linear applications of operational amplifiers
	Transistor switches			Electronics calculator and exercise generator: Base resistance of transistor switch circuits
Games	Blackjack game I			Simple Blackjack card game for 1 player
	Blackjack game II			Blackjack card game for 2 players
	Card reaction game			Simple 1- or 2-player "stop if the correct card is displayed" reaction game
	Chess pieces moves			Interactive application for chess beginners to learn how to correctly move the chess pieces
	EU and US coins			Calculation game: Find the EU/US coins to get a given amount of money
	Color circles			In two grids with colored circles, find the pair with different colors
	Decadic Grid			Logic game (number puzzle): Decadic Grid
	Dividers			Maths game: Find numbers with a given divider
	Dividers II			Maths game: Find numbers with a given divider (2-player version)
	Double Block			Logic game (number puzzle): Double Block
	Drop the orbs			Drop numbered orbs into columns in a way to get a column total of 20
	Fractions			Maths game for primary school pupils: Addition of fractions
	Grades			Logic game (number puzzle): Grades
	"Guess the word" game			"Guess the word" game for 1 player (words in English, French, German or Luxembourgish)
	"Guess the word" game II			"Guess the word" game for 2 players (with "gallows" construction for wrong letters)
	Kakkuru			Logic game (number puzzle): Kakkuru
	Kids puzzle			Classic puzzle game for children (27 puzzles from 12 to 72 pieces available as individual downloads)
	Labyrinth			Find your way through a variety of labyrinths
	Lightbulbs			Logic game (number puzzle): Lightbulbs
	Magic Square			Calculation game (not only) for primary school pupils
	Memory game			Memory game: Find picture pairs or triplets (10 picture sets available as individual downloads)
	Mirrors			Freely invented logic game, based on an idea that I realized in 2003
	Number Cross			Logic game: Find the numbers, that added per row resp. column equal a given row/column sum
	Number game			Numbers calculation game, inspired by the "Des chiffres et des lettres" gameshow on French TV
	Number puzzle			4-levels maths game: Guess which numbers hide behind the different shapes
	Skyscrapers			Logic game: Find the buildings, you can see in a row/column, when looking from the grid's borders
	Snake game			Extended GUI based implementation of my command line Snake game
	Sumdoku			Logic game (number puzzle): Sumdoku
	Word puzzle			Word-search puzzle: In a grid of letters, try to find the words given by the program
	Yahtzee			Classic Yahtzee game for 1 - 3 players
	Yakuso			Logic game (number puzzle): Yakuso
Maths	Arithmetic baubles			Mathematics trainer (problem generator): Arithmetic problems for primary school pupils
	Basic arithmetic operations			Mathematics trainer (exercise generator): Basic arithmetic operations with integers
	Binary numbers			Maths trainer: Binary numbers conversion, arithmetic and logical operations
	Column addition/subtraction			Mathematics trainer (exercise generator): Column calculations - Addition and subtraction
	Column multiplication			Mathematics trainer (exercise generator): Column calculations - Multiplication
	Complex numbers arithmetic			Mathematics trainer (exercise generator): Basic arithmetic operations with complex numbers
	Complex numbers calculator			Simple calculator to perform basic arithmetic operations with complex numbers
	Conic sections			Geometry: Parameter calculation and graphing of conic sections in their standard form
	Determinant calculation			2x2, 3x3 and 4x4 determinant calculation with display of the expansion minors
	Fractions operations			Mathematics trainer (exercise generator): Basic arithmetic operations with fractions
	Geometrical surfaces			Mathematics trainer (exercise generator): Area and circumference of geometrical surfaces
	Geometrical solids			Mathematics trainer (exercise generator): Volume and surface area of geometrical solids
	Geometrical transformations			Geometrical transformations: Translations and (simple) rotations
	Linear equations I			Mathematics trainer (exercise generator): Linear equations in 1 variable
	Linear equations II			Mathematics trainer (exercise generator): Systems of linear equations in 2 variables
	Linear equations III			Mathematics trainer (exercise generator): Systems of linear equations in 3 variables
	Logarithm equations			Mathematics trainer (exercise generator): Logarithm equations
	Measurement conversion			Mathematics trainer for primary school pupils: International measurement units conversion
	Measurement conversion II			Mathematics trainer for primary school pupils: American/British measurement units conversion
	Multiplication tables			Mathematics trainer (exercise generator) for primary school pupils: Multiplication tables
	Negative numbers			Mathematics trainer (exercise generator): Negative numbers basic arithmetic operations
	Polygons			Properties of regular polygons
	Triangles			Numerical trigonometry exercise generator: Triangles
	Percentage calculations			Mathematics trainer (exercise generator): Calculations with percentages
	Vector addition			Graphical vector addition and subtraction
Physics	Collisions			Elastic and inelastic collisions simulation
	Fluid mechanics I			Physics trainer (exercise generator): Fluid mechanics - Hydrostatics
	Fluid mechanics II			Physics trainer (exercise generator): Fluid mechanics - Perfect fluids hydrodynamics
		Physics of colors		Physics of light: Addition and subtraction of colors
	Plane in the wind			Addition of 2 velocities: Simple graphical simulation of a plane moving in the wind
	Planetary orbits			Graphical simulation of the 9 planets of our solar system turning around the sun
	Projectile motion			Graphical simulation of a canon, placed on a hill, firing a projectile at a given angle
	Pulley exercises			Physics trainer (dynamics exercise generator): Pulleys
	Radioactive decay			Nuclear physics exercise generator: Radioactive decay equations
	Ray tracing			Geometrical optics: Ray tracing with mirrors and thin lenses
	Simple pendulum			Simulation of a simple pendulum
	Temperature and heat			Some simple calculations concerning temperature and heat
	Weight on an incline			Application of Newton's laws: Simulation of an object slipping along an incline
Various	Biorhythm cycles			Biorhythm graphs: 3-months physical, emotional and intellectual biorhythm cycles
	Christmas tree			Full customizable Christmas tree with user defined message text and several colored balls blinking patterns
	Currency converter			Simple currency converter (with currency rates update from the Internet)
	Driving test trainer			Trainer application, generating right of way at road crossings exercises
	Memory trainer			Program that may be used to test your visual memory and try to ameliorate it
	Morse alphabet			International morse code converter and knowledge tester
	Music alarm clock			Alarm clock with individual time/music settings for each week day resp. 3 freely selectable dates
	Simple time calculator			Calculator application to add times (instead of simple numbers)
	World clock			Clock with local and world cities time
	Zodiac signs			Astrology: Historical aspects and personality characteristics associated with zodiac signs