"Pcal" is a program to print PostScript calendars for any month and year. By default, it looks for a file in the home directory named "calendar" for entries with leading dates matching dates on the calendar, and prints any following text under the appropriate day.

conversion tool to generate webpages from chess "portable game notation" PGN files. The webpages allow the replaying of chess games within a web browser. It has a commandline client and a gtk graphical user interface for convenience. The html output is highly customisable, it is using javascript and the webpages are standards compliant and working with all major browsers.

s3d is a 3d network display server which can be used as 3d desktop environment.

Replay or stream web server access logs as a retro game-like simulation.

Info document is an old (pre-html) hypertextual documentation format that is tradionally used for documentation of GNU utilities. GNU's default reader for info pages (simply called "info") however is not very easy to use due to its arcane key bindings.

dwdiff is a diff program that operates at the word level instead of the line level. It is different from wdiff in that it allows the user to specify what should be considered whitespace, and in that it takes an optional list of characters that should be considered delimiters. Delimiters are single characters that are treated as if they are words, even when there is no whitespace separating them from preceding words or delimiters. dwdiff is mostly commandline compatible with wdiff. Only the --autopager, --terminal and --avoid-wraps options are not supported.