Is there a wallet for different cryptocurrencies For a person who has different amount of different cryptocurrencies it is actually annoying to use many clients. Right now just Bitcoin data is more than 15 GB, litecoin 1.5 GB and so on.

Is there any wallet which incorporates many wallets? Is it possible?
You can use UFASoft Coin. Which is a multi currency client and miner. Also it's open source.

The supported currencies are.


Bitcoin - BTC
Bitcoin-testnet
Namecoin - NMC
Litecoin - LTC
PPCoin - PPC
NovaCoin - NVC
TerraCoin - TRC


This will essentially keep all your wallets in one application, so no more have 6 different wallets and clients. Then forgetting to start certain ones.

Just a side note regarding the performance of mining directly from the program: I have found it to be slower, around 10-30% slower than other miners.