for ubit
btw ubit.org is already taken
underwun, I think the name decision should be based on what is your target audience, if it's for instance financial institutions - Identabit would make a sense because the may care about "identity" and have a value proposition in the name can be a good thing, but if you are going to promote it to more mass market Identabit name wouldn't contain any value proposition for them and having more simple name like
ubit or
idex can have more benefits. If you are going to target Bitcoin users and crypto enthusiasts, having identity in it's name can even do some harm.
Also more general name you use, the easier it would be to pivot and target different markets.
Take a look at Dash - they were able to double their market cap with rebranding.
More good names examples (in my opinion): Ripple, Stellar, Ethereum, Graphene (btw I suggested to call new version Graphene and I think the name works great so far, I was even advocating to rebrand Bitshares into Graphene completely).