Peercoin.
Peercoin is a cypto coin created by Scott Nadal and Sunny King in 2012. In2013 Scott Nadal left the project leaving Sunny as the only developer.
It's a peer to peer cryptocurrency which uses proof of stake, and proof of work systems.
Unlike most coins Peercoin doesn't have a limit to the maximum number of coins that can be generated, and is designed to have an annual inflation rate of 1%.
There is also a deflationary side to it, since each transaction has a fee of 0.1 peercoin, which will then be destroyed.
The annual inflation will be the future 'mining' of Peercoin (minting) once rewards for traditional mining decrease. This makes for a more energy efficient coin compared to bitcoin which in 2013 used $150,000,000 USD per day in power consumption costs.
You can create your wallet here, at the time of writing one Peercoin is worth 1.33$.
Fun Fact: Peercoin is the official coin at the Star Trek convention 'Trek Con'.
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