tiny HTTP parser written in C (used in HTTP::Parser::XS et al.)
HTTP request/response parser for python in C
Fast HTTP parser
A C# Http Multipart/form-data parser that works correctly on binary data and very large files.
A pure JS HTTP parser for node.
OpenResume is a powerful open-source resume builder and resume parser. https://open-resume.com/
Python HTTP Agent Parser
HTTP header string parser
HTTP server implementation for Qt based on node.js' http parser
The Fast HTTP header parser library
java port of ry's http-parser
C++ wrapper for C-based HTTP parser
A pure Python LR/GLR parser - http://www.igordejanovic.net/parglare/