IOTA description:

Based in Oct 2015 for solving problem Internet-of-Things (IoT), transactions fee in blockchain is too huge for Internet of things (from car to light bulb).
In blockchain you need to pay to miners or coin holders for confirmation. In IOTA users confirm transactions of other users.
Zero Fees, you can make micropayment in realtime.
Instead of blockchain they use DAG – ** directed acyclic graph**.

Tech info about DAG.
Total in system 2,779,530,283,277,761 Iota ^{(MAX_SAFE_INTEGER - Javascript)}
ICO / Crowdsale was in Dec 2015, funded 1,337 bitcoin for development.
Owners David Sonstebo, Sergey Ivancheglo, Dominik Schiener, and Dr. Serguei Popov.
Popov laid out the math required for the Tangle, Serguei and Dominik written into code, The project is led by David.
The more transactions, the more quickly each transaction will be confirmed.
From March till Jun was exchanges, prices here .
Links:
Website
Buy
Reddit
API
Byteball vs IOTA-token