Any full wallet really.
But Bitcoin is really the slowest one to sync from the start as it has a lot of transactions and is the oldest.
True, just use a blockchain.info wallet, no need for download of the block chain.
but the online wallet not 100% safe.
Its not 100% safe but its pretty secure and hasnt had any real problems. Do not use an exchange to hold your coins, ever.
I use blockchain.info as my online wallet. I have a Yubi Key as a 2-factor authenticator so its pretty safe.