Simeon Simeonov, the Founder & CEO of FastIgnite, has put together a nice Stock Option Vesting Calculator. It works just fine for stock vesting as well.
Sim is a dynamite entrepreneur who has also done a tour of duty as a VC so he knows the drill well. In the email he sent me about it he said it was inspired to put it together after reading several of the posts in the Term Sheet Series that Jason Mendelson and I wrote several years ago.
Sim – next up – how about a simple liquidation preference and exit analysis calculator?