Fang of Mongo is a Web based user interface for MongoDB. It will allow you to explore the content of a MongoDB database with a simple but pleasant user interface. You can easily get insight on database content, query documents, and check index size.
mycelium is an information retrieval system. It aspires to be an alternative to Nutch / Lucene. It uses MongoDB as a storage engine.
A CPU and memory Java profiler.
An HTML photo album and thumbnail generator that supports themes/skins.