* ENS -> Ethernet Name Service. DNS but for blockchains. * IPFS -> Interplanetary File System. Distributed object store, think immutable P2P S3. * Glitter -> Sounds familiar but it's not coming to mind * Tendermint -> Consensus engine for blockchains, forms part of a toolchain meant to enable interop between blockchains alongside the Inter-Blockchain Communication (IBC) Protocol and the Cosmos SDK

The blockchain ecosystems really are their own little world unto themselves. It's all pretty cliquey, not in an exclusionary way but if you're not actively seeking it out then there's very little chance of you hearing about any of it.

Side note: IPFS is well worth checking out if you're interested in databases or decentralized zero-trust systems, and even if you're a blockchain skeptic. They're doing some really interesting work under the hood. The team hasn't latched on to the gold rush mentality the way so nearly all blockchain projects have.