I've joined 3 exchanges, but not all have the amount of crypto's and trading volume that cryptsy had. You may need to use different exchanges depending on the crypto's you wish to use. Also, it depends on how big a trader you are. Cryptsy minimum order size was 51 sats.

Minimum order sizes:
Poloniex - 10,000 sats
Bittrex - 50,000 sats
Bleutrade - 0.0001 of any currency tradeable in any of the BTC, LTC, or DOGE pairs. This is the site for small traders, although liquidity in many markets is low.
Vicurex - 1,000 sats, will cancel orders with unfilled remaining less than 1,000 sats. Based in Belieze and pays interest on balances. I didn't like the sound of that one.