Various Greasemonkey scripts that enhance Gmail:
For the new version of Gmail
For the old version of Gmail
- Conversation Preview: shows a preview bubble with a conversation contents while viewing the list of messages (i.e. without requiring navigation to another page) - more info
- Fixed Font Toggle: adds a font toggle button so that messages can be viewed in a fixed-width font more info
- Label Colors: allows labels to be colored so they stand out more more info
- Macros: adds more keyboard shortcuts (for marking messages as read, moving them to the trash, applying labels, etc.) more info even more info
- Google Reader Integration: adds a 'Feeds' links in the navigation area that opens up an embedded instance of Google Reader more info
- Saved Searches: lets you save search queries so you can re-run them easily more info