Firebird Firebird 1.5 is a full-featured SQL database engine. It is powerful, yet lightweight, with minimal configuration and administration needs. It's easily scalable from single-user, single-database usage up to company-wide enterprise purposes. A single Firebird server can handle multiple independent databases, each with multiple client connections. And best of all: it's true Open Source, thus free of any license fees even for commercial use.
Dot Lucene DotLucene - The Fastest Open Source Fulltext Search Engine for .NET
DB4O Embed db4o's native Java and .NET open source object database engine into your product and store even the most complex object structures with only one line of code.
WebORB WebORB Presentation Server is a platform for building, deploying and hosting rich client applications.
Firefox Firefox is a free, open-source web browser for Windows, Linux and Mac OS X and is based on the Mozilla codebase. It is small, fast and easy to use.
