1. metisA library for secure ink! Wasm smart contract development.
2. elaraElara provides the tools and infrastructure that allow developers to easily take their blockchain application from testing to scaled deployment. It's polkadot's Infura.
3. jupiterWasm smart contract networks powered by Substrate FRAME Contracts pallet in Polkadot ecosystem.
4. askAsk! is a framework to write Wasm smart contracts for Substrate Frame Pallet-Contracts in AssemblyScript
5. zkmegaZero-knowledge Tools for the Polkadot Ecosystem
6. europaA sandbox to run and debug smart contracts for FRAME Contracts pallet and also a sandbox framework for Substrate runtime.