Hi everyone,
I created www.MyAltCoins.com because I hate using clumsy excel spreadsheets to track all my altcoin investments.
The service is totally free and it works in this way: after a quick signup, you will add all your past transactions (manually, or by importing them via our multiple import tools for the major exchanges), which include exchanges from/to any currency combination, mining profits or spent coins/expenses/fees.
The service will then calculate your asset value (in BTC and in USD), and tell you the profit/losses per each altcoin you own.
MyAltCoins.com is totally free (donations are welcome :-) ), and i'd like to have some good feedback from the community.
Any new features you'd like to see?