Checkout Blockstack - token sale is ongoing, and Polkadot - they're planning on doing a secondary token sale towards the end of the year.
I just heard them. where do they sell IEO? or their plan to sell IEO? if I have a good exchange and competent developer, I might be able to join there.
For Blockstack, you'll find more details here -
https://stackstoken.com/. The public token sale is live till the 9th of September.