KeyRocket for Gmail recommends keyboard shortcuts while your work where it matters. KeyRocket informs you, via a subtle notification, when you could have used a keyboard shortcut instead of a series of mouse click.
Full Specifications
What's new in version 0.7.0.2
General
ReleaseSeptember 6, 2012
Date AddedSeptember 6, 2012
Version0.7.0.2
Operating Systems
Operating SystemsWindows, Windows XP, Windows Vista, Windows 7