Here is a simple add on that enables users to insert their signs in Google docs. It can track when a receipient opens and views the document.I think it is one of the best tools for electronically signing your documents.It relieves us from hazzles of printing and scanning.This sort of add in is simply a must have for project managers. It also helps you to receive the docs signed by others.Though, it is limited to 3 docs per month for free but i think that is enough for me. Might be you should also try it.
To add this add on to your chrome browser you have to click on this image and press the install button on the page.