I know binance is the most popular exchange, but binance and other exchanges such as okex, huobi, ...and others forced you to hold their token to participate in IEO, so i list exchanges do not forced you to buy token.
Okex, Binance and Huobi are pretty big exchanges and their IEO's are very scuffed - they force you to invest in their own project, before you get access to pretty well done IEOS that always go 2x, due to a lot of the pumping that the companies do themselves.
As for the other exchanges:
Latoken is a scam, they basically ask for 10k upfront and then they won't help the IEO, or anything at all, their IEO's almost never do well and you see a bunch of shitcoins on there.
On the other side of the spectrum, Probit is a great new korean exchange and they've helped and held a bunch of sucessful IEO's for their clients, I'd recommend you to take a look there.