jEdit is a programmer's text editor written in Java.
The free computer aided translation (CAT) tool for professionals
Save time and effort of converting into Unicode through native2ascii
Symja - Java computer algebra language & symbolic math library
Launch an external diff tool like WinMerge in Eclipse
CAM XML Editor for XML+JSON+Hibernate+SQL Open-XDX sponsored by Oracle
EditBox is the Eclipse plugin for source code background highlighting.
Java bytecode editor
Performance and Productivity at Scale
Vim-like editing in Eclipse
Literate programming for eclipse
Pure Trait-based Programming on the Java Platform
Paste from your Copy history!
a DSL for type systems, reduction rules, interpreters for Xtext langs