jvmBasic is a BASIC compiler which emits Java bytecode. jvmBasic includes an implementation of the BASIC RTL, and a simple web server which uses BASIC as a scriptlet language.
To date, I've written 4 grammars for ANTLR4 which have been accepted in to the grammars source tree
I wrote an open source Java web framework focussed on modularity and easy of configuration. You can read about Pragmatach here, or visit the web page.
I've made a number of contributions to Crochet-BSD, including writing the support for Soekris and Wandboard. I was also briefly involved with FreeBSD-arm-tools.
I was a contributor to OMF (Object Manager Framework), a ORM layer written on top of the JCR. In particular, I wrote the contribs.
As part of the effort to write an ANTLR4 grammar for HTML, I needed a test suite to test the grammar against arbitrary HTML-esque input. This resulted in me writing HTMLParser.
My Open Hub profile is here.