couchCookie is a PHP5 class that authenticates and stores a user session in a CouchDB database via a random key stored in a cookie.
get pretty is a PHP5 class that implements mod_rewrite-like behavior to provide 'nicer' URLs for _GET vars. It uses the _SERVER global and does not require any server modifications.
A pure Java library for reading and writing MS Access databases.
A mature implementation of a SIP server/proxy.