Sesame Database Manager - Lantica Software, LLC - Sesame, A Q&A-compatible Database Manager.
Mongoku - A neat Web-based GUI for MongoDB
XtraBuild Designer - XtraBuild offers software development tools for database and reporting applications. No coding!
adminMongo - An open source admin user interface for your MongoDB
Sheep - Membership and events for SMEs and nonprofits
MongoLab - MongoLab is a fully managed MongoDB Database-as-a-Service platform that automates the operational aspects of running MongoDB in the cloud.