Is this Shakespeare as a wiki or Shakespeare open source? Who cares? This is a great site from the Open Knowledge Foundation that allows you to read all of the Bard's works, compare texts side by side, contribute and make comments, read critical essays and even view play statistics (although at the time of writing this is still getting off the ground) - all for free.

So, if you have ever wondered how many times the protaganists utter the word "love" in a Lover's Complaint (a mere ten times), then this is the place for you.

http://openshakespeare.org