i-Tor is a set of Tools and Technologies for Open Repositories, based on Linux, Java, MySQL, Mirage and other free components. It harvests OAI and turns databases into Open Archives. It includes similarity, backlinks and related search based on Lucene.
Mirage implements an complete 100% transparent Object Relational mapping for Java. It builds the database schema incrementally, to support incremental development and refactoring as it happens in Extreme Programming.