You can look at the list of coins on coinwarz.com (
http://www.coinwarz.com/cryptocurrency) just scroll down. On the far left it shows which ones are "Scrypt" and which ones are "SHA-256". The SHA256 are pretty far down the list because they have a higher difficulty compared to their value (so less profitable) (simplified explanation).
The flip side is there are no asics for Scrypt yet, so you have to use one or more high end AMD GPUs to mine efficiently.