MyCrypto

MyCrypto is an open-source tool that allows you to manage your Ethereum accounts privately and securely. Developed by and for the community since 2015, we’re focused on building awesome products that put the power in people’s hands. Maintained by MyCryptoHQ on GitHub, where it has earned 1,406 stars from the community.

It's actively developed around ethereum, wallet, wallet-generator, and is a solid reference for anyone building with these tools.