teepeedee is a small, fast, single-threaded file server. It is very scalable, and can serve multiple files over HTTPS, HTTP and FTP simultaneously, listening on any number of ports and providing entirely different views of the filesystem to different users. It supports most of the draft-ietf-ftpext-mlst-16.txt FTP extensions, as well as EPRT, EPSV, AUTH TLS, and HTTP 1.1 persistent connections.
telepathic-critterdrug is a fork of Critterding, an artificial-life simulation, with five drugs added and a substrate for two kinds of telepathy. The critters are exposed to a secondary retina they can all read and write, using sensors and motors for high intensity or only the power of the minds for lower intensity, though drug use will modulate it. They can blink this and their main retina as a minor grace. The two blue tablets work on inhibitory neurons, and the red ones, excitatory. There is also a purple potentiator.
tinyldap is a small (11k uncompressed static binary on x86 Linux) and fast (1000 equal queries for one of 3000 records in less than one second on a 1.3 GHz Athlon, with over 3000 separate TCP connections using tcpserver) read-only LDAP server. No tricks like file descriptor passing, thread pools, or caching are used (aside from the buffer cache from the operating system).