Jyntax is a simple, easy-to-use, light-weight syntax highlighter for Java. It is designed for applications providing JTextComponents that should be enriched with syntactical highlighting and works best for formal (logical or mathematical) input.
KoffeeKup - The simple, bitter Java mixer for those that like to keep light A Java-based IDE geared towards developing your Java applications further in a slim, single file great for travel and minimalists