Binance
ChangeNOW
Bittrex
HitBTC
SimpleSwap
agree on #1 and #3 , #4 . change now is now a scam and i dont heard about simple swap . what i like the most is binance due to thier huge volumes . i rarely trade on hitbtc if ever i cant find my coins listed on binance . bitrex is also a popular exchange before before the dominance of binance .
dex exchange is also on my 3rd list , specifically etherdelta/forkdelta because i also love to join airdrops and bounties . i see that ed and forkdelta were the first one's that list my altcoins and erc20 coins
I don't know how the user listed changenow, it is already a proven scam. They have a lot of scam accusation. Simple swap is familiar to me but never tried with it because I am using one of the local methods for most of the swap other than BTC pair.