The GetData library provides an API to interface with Dirfile databases. The Dirfile database format is designed to provide a fast, simple, scalable format for storing and reading binary, synchronously-sampled, time-ordered data.
Database front end for SQLite, PostgreSQL and MySQL
A RAD database front end tool for building rich client GTK-based GUI applications on SQLite, PostgreSQL and MySQL, using embedded Python as scripting language
sqlmap is an open source penetration testing tool that automates the process of detecting and exploiting SQL injection flaws and taking over of database servers.
Libdejector is a database tool which defeats SQL injection attacks by performing context-free validation of queries. While written in C, SWIG wrappers exist for Python and other languages will be following soon.