List of current ICOs (Initial Coin Offering), these are sales of crypto-currencies tokens comparable to fundraisers.
An ICO is an unregulated and controversial way of crowdfunding via the use of cryptocurrency, which can be a source of capital for start-ups.
This video of The Blockchain Guys explains very well how works this revolutionary way of raising funds for a web company. The amount raised via ICO by these same companies even surpassed in June 2017 the raised amount through the classic business angel and seed funding.
Individuals can now become business angels thanks to this new mode of crowdfunding. Purchased tokens are not just an investment: they also represent part of the service offered by the company behind the fundraising.