About Stellar:

Stellar was created on 31 July 2014, by Stellar Development Function. Initially, this cryptocurrency was based on Ripple code. It’s an open-source protocol for digital transfers. Stellar has a special currency – Lumen (XLM), and its purpose connects bank institutions among others in developing markets. On 4 January 2018, Cardano had its own ATH (All-Time High price), which was equal to $0.938144.

Resources:

Official website: https://www.stellar.org/
Whitepaper: https://www.stellar.org/papers/stellar-consensus-protocol
Source Code: https://github.com/stellar