MessagePack is a binary-based efficient object serialization library. It
enables to exchange structured objects between many languages like JSON. But
unlike JSON, it is very fast and small.

The Google SparseHash project contains several C++ template hash-map implementations with different performance characteristics, including an implementation that optimizes for space and one that optimizes for speed.

Coccinelle is a program matching and transformation engine which
provides the language SmPL (Semantic Patch Language) for specifying
desired matches and transformations in C code. Coccinelle was
initially targeted towards performing collateral evolutions in Linux.
Such evolutions comprise the changes that are needed in client code
in response to evolutions in library APIs, and may include
modifications such as renaming a function, adding a function argument
whose value is somehow context-dependent, and reorganizing a data
structure. Beyond collateral evolutions, Coccinelle is successfully
used (by us and others) for finding and fixing bugs in systems code.

This package provides a code generator and runtime libraries to use Protocol
Buffers from pure C (not C++).

It uses a modified version of protoc called protoc-c.

This is an attempt to create a fast web interface for the git scm, using a builtin cache to decrease server io-pressure.