Ohloh is a service that does some fairly deep analysis to the codebase and the committers who contribute to it. The results are not always super accurate, but they can give you a general idea of the amount of work that goes into the project as a whole.
Donate to Evolution RTS!
Evolution RTS is a free project and will always be free! That said, there are various costs associated with keeping the project updated and worked on. Not the least of which is the server costs.
You should not feel pressured in any way to donate, but if you want to donate and help me out, I would greatly appreciate the support! Thanks for playing Evolution RTS!!!