truebit

The Graph is an indexing protocol for querying networks such as Ether and IPFS. Anyone can build and publish open APIs, called subgraphs, to make data easily accessible.

Build a model for checking contracts yourself via github.

Production-ready multi-chain interoperability platform for serious Dapp developers

Ankr makes it easy to access Web 3.0. We provide a distributed, multi-cloud blockchain infrastructure for one-click node deployment and management, as well as instant API access for developers to major blockchains and DeFi protocols. Ankr is a Web 3.0 infrastructure provider. We provide a globally distributed network of nodes for multi-chain access across 40+ blockchains. The Ankr platform is built on top of this multi-chain node foundation, providing one-click node deployment and management, as well as instant API access to all major blockchains and protocols. Ankr simplifies building and monetizing on the blockchain for individuals, developers and enterprises.

ETH developed the online compilation tool REMIX, very simple, hacker do not need to install any other programs or configure the system environment, mainland users may need to go over the wall.

CoinAPI is a platform that provides a fast, reliable and unified data API for the cryptocurrency market.