SRPC is an enterprise-level RPC framework widely used by Tencent, Sogou and many small and medium-sized companies. It handles hundreds of millions of requests every day, mainly from search engines. It supports two common IDLs: protobuf and thrift, and implements several commonly used rpc protocols. It is also an open source version of Tencent's enterprise-level RPC protocol, tRPC.

The Visualization Toolkit (VTK) is an open-source software system for 3D computer graphics, image processing, and visualization.

The URDF (U-Robot Description Format) library provides core data structures and a simple XML parsers for populating the class data structures from an URDF file.

dbus-fast is a Python library for DBus that aims to be a performant fully featured high level library primarily geared towards integration of applications into Linux desktop and mobile environments.

The Visualization Toolkit (VTK) is an open-source software system for 3D computer graphics, image processing, and visualization.

Smaller C is a simple single-pass C compiler with support for most of C89 and C99. It targets 16- and 32-bit x86, and MIPS, on DOS, Windows, Linux, and older versions of macOS.