MongoExplorer
- a great Siverlight GUI for mongo db data. Excells at visualising data, decent at filtering data, does not offer a console.
RoboMongo
- multiplatform, free. Good at visualising data, has a shell where you can execute different javascript complex queries, including map-reduce. My favourite from the list
MongoVUE
- commercial, with a trial version. The trial version, at this time, is pretty limited: you cannot open more than 3 tabs with collections, you don't have a javascript console. You can, however, run map-reduce queries.
What's your favourite tool?