Manna (ticker MANNA), which was launched on May 1, 2015 as Grantcoin (GRT), is the first cryptocurrency distributed primarily by a charitable nonprofit organization as Universal Basic Income to people around the world. Manna's technology is based on Peercoin (PPCoin), an offshoot of Bitcoin. Like Bitcoin, the Manna network is currently powered by SHA-256 Proof-of-Work mining, and does not use Peercoin's Proof-of-Stake system for distributing block rewards.
This "legacy" version of Manna is a rebranded version of the original Grantcoin codebase. It is fully compatible with the Grantcoin legacy code repository and the Grantcoin official code repository through block 1,100,000 of the blockchain, at which time a mining reward reduction will occur for Manna. The Manna legacy version is distributed under the MIT/X11 software license. See COPYING file and http://www.opensource.org/licenses/mit-license.php for more information.
Anyone who would like to join the Manna development team as a volunteer, to help with coding and/or testing and debugging, please contact us at [email protected]. We are always interested to have more input and assistance to continue developing the Manna code and software.