dlh is a fast LaTeX-to-HTML translator written in C that can handle most of LaTeX. It features not invoking LaTeX for any purpose; with the exception of figure support it's completely independent of any other program. In particular, it generates all cross-references and table of contents in a single run Tables are supported and translated into HTML3 tables, and PostScript figures (\psfig command) are supported (requires GhostScript and pnmtogif to translate PS into GIF files).
Buffy displays a window with a summary of your mailboxes and lets you open them in your mail program. It is written with the intent of being a handy everyday tool for people working with large volumes of mail. For mutt users, it can be a nice front-end to supplement the simple built-in folder browser when one has many folders to keep track of. It tries hard to work out of the box and looks for mail folders in sensible places and comes with reasonable defaults. It supports mail stored in maildir, mbox, and gzipped mbox format.
cgi_trampoline.c is a parametric C program which executes a CGI script in a specific directory and sets the real UID and GID to the effective UID and GID. It is safe to set the setuid/setgid bits of the binary of cgi_trampoline.c. initgroups() and setgroups() are not called, because this works only as root. cgi_trampoline.c contains optimizations for Linux i386, so the generated binary will be statically linked and very small.
LibJAD is collection of miscellaneous routines for a variety of purposes. This library includes functions of reading ini style files, multi-threaded programming, finding the number of processors available on the system, computing combinations and permutations, base64 and URL encoding, and working with ASN1 and PGM files.