Did you notice how crappy email signatures look on POP3 accounts compared to Outlook?
The WiseStamp Firefox extension tries to solve that problem by applying a rich HTML editor on email clients such as Gmail, Yahoo Mail, Hotmail, and AOL mail. The signature is easily customized by adding links/icons to social media profiles (Facebook, LinkedIn, Twitter, etc), IM and Skype accounts as well as automatically sharing recent blog posts, latest tweets, and more.
See and example and many more in the signature gallery:

WiseStamp was founded about a year ago by Josh (Tzvika) Avneri, Sasha Gimelshtein, Orly Izhaky and Tom Piamenta. The WiseStamp add-on has been downloaded over 300,000 times a was featured as a recommended add-on by Mozilla. The company is now in the process of raising funding. Learn more on WiseStamp’s FAQ and download through this link.
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