What is Shardus?
Shardus is software that helps facilitate the development of decentralized, distributed applications. Think of it as a package that you install from the internet that provides tools for building applications.
Shardus can often get confused with programmable blockchains like Ethereum. Shardus itself isn't a blockchain — Shardus provides you with a powerful framework to easily build a scalable blockchain.
Liberdus is an example of a decentralized blockchain that is built using shardus. Shardus handles all the complexity that exists behind the scenes in regards to blockchain applications.