free wallpaper engine

CertMagic.com leads all other test engine simulators including selftestsoftware

CORE Ecommerce is a proven engine for running eShops, creating marketplaces.

Create tons of quiz games with this customizable Flash game engine.

Web survey engine for authoring surveys and generating reports in real-time!

Namazu is a full-text search engine intended for easy use.

Search, Save and Organize web sites fast with the personal search engine toolbar

Shared Files Search Engine Script.

Elgg is an open source social engine

SQLite COM is a fully functional in-process SQL database engine.

Powerful text operations engine to process large number of files routinely.