JSON that's part of C++
Formatting library as an alternative to C stdio and C++ iostreams
Kotlin multiplatform / multi-format serialization
JSON implementation for Ruby
LaTeX support for the IntelliJ platform by JetBrains
Cross-platform SDK for creating and modifying PDF documents
A static analyzer for Java, C, C++, and Objective-C
Explains and suggests fixes for compile-time errors for C, C++, C#, Go
Web Framework built on top of Qt, using the approach of Catalyst
No ceremony, just code. Blazing fast, typesafe binary serialization
the MiKTeX source code
Lighter, faster browser kernel of blink to integrate HTML UI in apps
Extremely fast, in memory, JSON and interface library for modern C++
Google's data interchange format
A library that can help you with generating PDF documents
An implementation of the TLS/SSL protocols
simplejson is a simple, fast, extensible JSON encoder/decoder
Lexbor is development of an open source HTML Renderer library
C++ Qt ORM (Object Relational Mapping) and ODM library
10x faster string search, split, sort, and shuffle for long strings
TreeFrog Framework, High-speed C++ MVC Framework for Web Applications
Bug-fix-only libev port of shadowsocks
A fast and reliable ARQ protocol
Pure Clojure Webdriver protocol implementation
Development toolkit for Web Services and XML data bindings for C & C++