Some useful links (more or less randomly ordered):

marvin @ sf.net	go
Our development server - sometimes offline ;-)	go
ABLE @ IBM T. J. Watson Research Center	go
JFreeChart Java Framework for Chart rendering	go
FreeHep Java Framework for (vector) graphics rendering	go
JavaHelp Java Help system	go
Eclipse Our first choice	go
JUnit Unit Test Framework for Java	go
XP Extreme Programming	go
Styleguide Code Conventions for the Java Programming Language	go
CVS Concurrent Versions System	go