Here is a list of sites where you see which are the existing ICO, where you can invest:

https://www.smithandcrown.com/ - a site which provides not only a list of existing ICOs but also a description of the coin projects.
https://www.coinschedule.com/ - provides a list of available ICOs
https://www.icocountdown.com/- another site providing a list of ICOs
https://www.ico-list.com/
https://tokenmarket.net/
https://www.icoalert.com/
You can also read some ico analysis here:
*https://crushcrypto.com/ico-analysis/