CryptFolio Keep track of all your cryptocurrencies (BTC/LTC/NMC/FTC)
Features
Keep track of your cryptocurrencies securely
Stay updated with your online securities and funds
Supports a wide variety of currencies, exchanges and wallets
Perfect for offline/cold wallets or distributed portfolios
Easily put together personalised reports with information that is relevant to you
Open source
How does it work?
Provide any number of public BTC, LTC or FTC addresses
Similarly, provide read-only API access to your wallets, exchanges or other accounts
Data is downloaded regularly and compiled into reports
No personally identifiable information is ever necessary
All downloaded data is either publically accessible or through read-only secured APIs, meaning your funds will always be safe
http://cryptfolio.com/