UniDB is a database abstraction layer for PHP developers. It's goal is to enable the developers to focus not on cross database compliance, but to focus on the main purpose of the program. It is developed principally by AfroSoft.
Open source project that offer summary and download services on this page is a project that carry out their development work on other open source development sites. Their work is linked to this page via a feature called OFI, and their work is not carried out here on OSDN site.