JDK (Java Development Kit) from Sun
Jikes (very fast Java Compiler)
Graphical Development Environments:
JBuilder from Borland
Visual Cafe from Symantec
Visual Age from IBM
JDBC Data Access API (including Online Tutorials)
PostgreSQL (Linux)
MySQL (Linux)
PointBase
InstantDb
Cloudscape
JARS
Gamelan
Java Cats
Java Boutique
Open Source Java Web-Ring
Dave Central
Java Shareware
Giant Java Tree
Software Technologies
SourceForge
Java2HTML converts Java code into colourised HTML
DynamicJava is a Java interpreter