FAIN SNAP provides an active network programming language and interpreter. It allows finite state machines to be operated over a number of network elements. Its main use is to program firewalls and raise alerts. It is a native Debian distribution.
JSPowerLin - Linux with a Java edge, a lightweight platform for developing and deploying J2EE applications and Java Server Pages on a server or servercluster.
Denwer is a collection of often-used web-servers for web-programmers. It is used to debug web-sites under Win32. Denwer includes: friendly installer; Apache; PHP; MySQL; Perl; virtual host managementsystem; phpMyAdmin; sendmail stub; start/stop manager.