Ben and CounterParty might be applicable too, as they both impkement smart contracts.
Sorry, meant NEM
But wasn't NEM an ICO too? I remember they were selling NEM shares in NXT back in the day. So everything recommended in this thread can be delisted from the exchanges if the SEC or whoever defines them as unregulated and unlicensed securities. Yeah, that includes NXT, ETH, NEM, WAVES, ARDOR... The whole lot of them.
Counterparty isn't an ICO, so that might get a pass. But if there's one project that has a built in decentralized exchange that couldn't be considered an ICO, it's BURST. No premine, no ICO, no dev tax and all that bs.
I think it would be hard for any government to take the BURST decentralized exchange down if ICO's are being issued and traded using it.