Software Downloads and Purchase

Most software on this web site is free and has been released under the GNU General Public License (GPL). The same Java programs will run on Linux, MacOS, Windows, etc. You may need to download the Java "run-time environment" first. All packages include brief installation instructions. More detailed instructions may be found on my "Running Java Programs" web page.

Links in the table below have special meaning. A "learn" link connects you to a programming assignment that explains the purpose of the program, gives you hints and suggestions, and may include sample source code. A "look" link shows an image of the program. A "read" link has documentation in Adobe Acrobat PDF format. A "web" link is a browser page where you may run the Java program as an applet, no downloading necessary! A "zip" link downloads a ZIP archive file with the program, PDF documentation, and related materials. See also my "Computer Programming Examples" web page, although you may have to edit and/or compile those for yourself.

Linux, MacOS, Windows


Java Games:
	Dots and Boxes	also known as Lines and Boxes	web		zip	GPL
	John Conway's Game of Life	project growth and decay based on simple rules	web		zip	GPL
	Maze Fog	solve a maze with a limited view	web		zip	GPL
	Reversi	also known as Othello	web		zip	GPL
	Tic-Tac-Toe	also known as Ticktacktoe, X's and O's, Naughts and Crosses	web	learn	zip	GPL

Java Utilities:
	Character Map	display characters in text fonts, and copy those characters to the system clipboard	look	read	zip	GPL
	Compare Folders	compare files, folders, and CRC32, MD5, SHA1 checksums in XML format	look	read	zip	GPL
	Delete Duplicate Files	compare a folder of unknown files with files in a known good or "trusted" folder, then delete all files from the unknown folder that are already in the trusted folder	look	read	zip	GPL
	Dump File	dump content of files in hexadecimal and as text	look	learn	zip	GPL
	Echo Arguments	simple console application to echo (print) its command-line parameters, for debugging command scripts ("batch" files)		learn	zip	GPL
	Erase Disk	erase the empty space on a disk drive or flash drive	look	read	zip	GPL
	File Checksum	compute CRC32, MD5, SHA1 checksums for files	look	read	zip	GPL
	File Redate Rename	rename multiple files or change their directory dates	look	read	zip	GPL
	File Search	find files that contain (or don't contain) a given stringor regular expression	look	read	zip	GPL
	Find Duplicate Files	search for duplicate files that have the same size and the same MD5 checksum	look	read	zip	GPL
	Font Checksum	verify internal checksums in OpenType or TrueType font files	look	read	zip	GPL
	Font Names	display name tables from OpenType or TrueType font files	look	read	zip	GPL
	Font Redate	change file directory dates to match internal font dates for OpenType, PostScript, and TrueType fonts	look	read	zip	GPL
	Font Rename	change file directory names to match internal font names for OpenType and TrueType fonts	look	read	zip	GPL
	Hex File Editor	edit or view files as hexadecimal digits or text characters	look	read	zip	GPL
	Hexadecimal Text	convert between text characters and binary, decimal, hexadecimal, octal, or ternary digits representing those characters	web		zip	GPL
	Icon Editor	edit icon images in Windows or FAVICON.ICO files for web pages	look	read	zip	GPL
	Obscure Text	randomly disguise letters and digits in plain text files	look	learn	zip	GPL
	Plain Text	convert Unicode characters to plain text, for example, quotation marks for web pages	look	read	zip	GPL
	Similar Words	find unique words or identifiers, by avoiding words that are similar to each other	look	learn	zip	GPL
	Trim File	remove trailing spaces and tabs from plain text files		learn	zip	GPL

GNU General Public License (GPL) programs are free to use, and free to redistribute as-is without changes. Before you modify a GPL program, please read the license (long and boring) or the frequently asked questions (FAQ). You must agree to the GPL if you want to make changes to a program or its accessory files, or to use any file outside the context intended by the author or authors in their original distribution. The conditions of the GPL are actually quite generous and are meant to ensure that you are equally generous. Help me, help you, help others.

Use of these programs is entirely at your own risk. The author or authors are not responsible for your ability or inability to use the programs, or for what may happen if you do use the programs. As the GPL says, this software is distributed in the hope that it will be useful, but without any warranty, without even the implied warranty of merchantability or fitness for a particular purpose.

Custom versions are available, and PayPal donations are always welcome.

This page was last revised on Monday, 11 May 2009.