Tezos - Participate in the governance of your cryptocurrency. Read the source code of any smart-contract on the blockchain.

As I understand it, the source code of tezos itself is stored on its own blockchain. Any modifications to the source are proposed by and voted on by owners of the tezos currency (weighted by how much they own). Also, unlike Ethereum, smart contracts are stored as source code on the blockchain, rather than as compiled bytecode.