A Portable Database
an all new query language and a sequel to SQL
plugin-based framework for systematic and reproducible experimentation
Source code for be able to use Relation Tags.
Big Sack: A lightweight Java Key/Value store with undo and disk cache.
XDBM is an XQuery implementation on the W3C's EXI binary XML format.
Very easy to use databrowser and query console for SQLite3 based on QT
Java API and Groovy Library for XML Scripting
Convert data file from fixed width format table to CSV
Mobile App designer + interpreter
Free tool designed to make client side hacking easy
Database ETL utility