Well handy for testing web services. Can import a WDSL and create a test suite.
Burp Suite
Java based proxy for HTTP(S) see what is being sent to a remote localation, manipulate it etc
WireShark
General Network Sniffing Tool - Handy when you aren't sure why a TCP connection is dropping
xSQL
Excellent tool for comparing 2 databases (SQL Server) to document schema differences
Hudson
Continuous Integration
http://www.javapractices.com
http://www.hibernate.org - ORM Mapping
http://www.springframework.org - IOC Server
http://www.quickserver.org/ - Multithreaded network apps
http://maven.apache.org - project building
http://www.theserverside.com - good j2ee site
http://www.postgres.org - Opensource multiversioning database. now supports windows
http://www.h2database.com/ Java based DB
http://www.myeclipse.org
http://www.jdocs.org
http://www.javalobby.org
http://cargo.codehaus.org - Container wrapper api. makes it easier to start stop etc containers from ant
http://www.javapractices.com
http://www.hibernate.org - ORM Mapping
http://www.springframework.org - IOC Server
http://www.quickserver.org/ - Multithreaded network apps
http://maven.apache.org - project building
http://www.theserverside.com - good j2ee site
http://www.postgres.org - Opensource multiversioning database. now supports windows
http://www.h2database.com/ Java based DB
http://www.myeclipse.org
http://www.jdocs.org
http://www.javalobby.org
http://cargo.codehaus.org - Container wrapper api. makes it easier to start stop etc containers from ant
