A really simple curses based mongo browser, capable of simple updates.
To run it type cursedmongo.py <database>.
The screen is split into 3 sections. The top section lists the collections, use the cursor keys to move around and select a collection by pressing enter. This will load a list of documents into the bottom left hand pane showing the value of the documents _id field.
At the moment to switch panes you have to use the cursor keys as well and scroll all the way to the top/bottom. Selecting a document loads it into the bottom right pane where you can edit the JSON and save (back in one of the other panes) by pressing 's'.