Ethereum C++ implementation https://github.com/ethereum/aleth/blob/master/README.md
Framework for Ethereum DApps (channel moved to https://gitter.im/embark-framework/Lobby )
Nethermind is a full .NET Core client implementation for Ethereum network running on Windows, Linux and Mac (https://github.com/NethermindEth/nethermind)
A WIP implementation of sharding in Rust. This room is for general discussion, while [the Development room](https://gitter.im/Drops-of-Diamond/Development) is for development discussion. https://github.com/Drops-of-Diamond/Diamond-drops
For discussion about development of Drops of Diamond: a sharding implementation to scale Ethereum on-chain with the fast, safe and productive Rust programming language.
Python-based EPM (Ethereum Package Manager) for Serpent 2 and Solidity contract deployment using YAML for package definitions.
Blockchain Development Talks
Ethereum Tokens and Data Viewer. API, Widgets for your tokens
Chocolatey package to install the C++ Ethereum client: AlethZero
Vertigo is a mutation testing framework for smart contracts
Decenture Documentation - http://git.io/decenturedocs
A test-framework for smart-contracts.
Coinformant.com's Cryptocurrency listing related discussions, FAQs, and suggestions.