LaunchKit - Open Source - A popular suite of developer tools, now 100% open source.
SmartContract.com - ChainLink - Connect Smart Contracts to your Applications and Data
whatdevsneed - This is whatdevsneed.
Gelato Ops - Gelato Ops makes it easy to automate arbitrary smart contract functions on blockchains like Ethereum.
SmallDevTools - Handy developer tools with a delightful interface
Fondu - Open source free ICO smart-contract builder