SmartContract.com - ChainLink - Connect Smart Contracts to your Applications and Data
Set in Block - Blockchain-based permanent message creator and reader
Cues.sg - Cues is a website that generates code for your own smart contracts and Web 3.0 apps, in a simple 3 step process.
CryptoKitties - Breed and collect adorable creatures using Ethereum
Fondu - Open source free ICO smart-contract builder
Ethereum Gas Monitor - Ethereum Gas Monitor is a mac menu bar app that displays gas prices for fast, average and safe slow ethereum transactions.