I advise not to get involve in ICOs during this time approximately till the end of 2017 lets everything be clear first about unstable markets , bad history of some ICOs at this year , for the time being keep your coins safe for some positive trade and enjoy free airdrop projects .
and if you cant hold back yourself or you want to wait and to invest in the future, do for sure DEEP investigations for the ICOs you want to invest to, try to find as much as possible informations, use the search or ask question for things you maybe find weird or something like this. if there are any red flags or open questions: STAY AWAY AND DO NOT INVEST. There is to much ICOcrap on the market and in this forum.
Actually his not asking for any advise like you said his asking for any online etherium wallet to be used in ICO btw, @OP you can transfer your ether in this wallet
https://www.myetherwallet.com this is the most trusted wallet for me so far you can create new wallet and keep your private key and to be able to invest in ICO just go to the official site of ICO site you wanna invest and click join crowdsale or buy token something like that.