What are some open source blockchain projects? I was trying to build a blockchain to host my cryptocurrency.For that I was searching for some open source blockchain projects and I came across Best blockchain open source projects which mentioned names like :


Eris
MultiChain
HydraChain
OpenChain


I was concerned whether these projects allow you to build your own blockchain or they just let you build something like a Dapp on their blockchain?
The most famous open source Blockchains are Bitcoin Blockchain and HyperLedger Blockchain.