Echomine Muse provides an easy-to-use Java API
that gives you quick and easy access to network
collaboration services. Specifically, it allows
you to communicate with Jabber/XMPP servers to
perform instant messaging and presence management.
Napsack is a specialized multi-threaded client for broadcasting Napster queries across multiple servers. The list of target servers is retrieved from www.napigator.com and is user-filterable (based on the number of users, files, or gigs indexed).
mp3report is a flexible program to scan a list of (sub)directories, creating an MP3 report from an HTML template. It also calculates various statistics and can report on ID3v2 tags and MP3 header information, including VBR.