A few programs I've released for you to enjoy. All are free for non-commercial use. Some have more generous licences.

• ROT-13 (in INTERCAL)
• collapse.ex — Collapse multiple blank lines, to a rather picky specification.
• Abyss 2525 — A futuristic roguelike game. Abandonware. Feel free to pick it up and take it over. Note that Angband has advanced considerably since Abyss branched from its codebase.
• color_xterm — An obsolete variation of xterm, now that the base version supports colored text and cheap memory causes indifference to X's bloat.
• C++ to HTML converter. And the self-HTML-ized version.
• A self-printing program (quine) in Unlambda. Warning: Large.
• G3W — A interrealm gateway for the Gale messaging system.
• 99 bottles of beer on the wall in ex. Run as "ex -s < 99.ex".
• 4space — displays lattices of 4D polytopes. Can be used as a screensaver.
• unlambda interpreter. Fastest that I know of. Includes a pseudo-compile to C option. (See also my Unlambda page.)
• A cryptogram puzzle assistant.

If my ex scripts aren't working for you, first check to make sure you're not running the extensively broken "vim". If "ex -v" brings up the vim startup screen, you should reinstall the stock vi/ex if available, or if not a faithful clone such as nvi.

For some excellent C programming resources, check out this site from Lysator of Linköping University.