Rugged is a library for accessing libgit2 in Ruby. It gives you the speed and portability of libgit2 with the beauty of the Ruby language.libgit2 is a pure C implementation of the Git core methods. It's designed to be fast and portable. For more information about libgit2, check out libgit2's website or browse the libgit2 organization on GitHub.

rugged - ruby bindings to libgit2

Cocos2d-x is a suite of open-source, cross-platform, game-development tools used by millions of developers all over the world. Cocos2d-x allows developers to exploit their existing C++, Lua and Javascript knowledge for cross-platform deployment into iOS, Android, Windows Phone, Mac OS X, Windows Desktop and Linux, saving time, effort and cost. Cocos2d-x is fast, easy to use and loaded with powerful features.

Cocos2d - Cross-platform, game-development tools used by millions of developers all over the world

Libmill is a library that introduces Go-style concurrency to C. It can execute up to 20 million coroutines and 50 million context switches per second. It also contains simple networking and file access library that allows users to quickly bootstrap application development.

libmill - Go-style concurrency in C

jsmn (pronounced like 'jasmine') is a minimalistic JSON parser in C. It can be easily integrated into resource-limited or embedded projects. Most JSON parsers offer you a bunch of functions to load JSON data, parse it and extract any value by its name. jsmn proves that checking the correctness of every JSON packet or allocating temporary objects to store parsed JSON fields often is an overkill.
 
jsmn is designed to be robust (it should work fine even with erroneous data), fast (it should parse data on the fly), portable (no superfluous dependencies or non-standard C extensions). And of course, simplicity is a key feature - simple code style, simple algorithm, simple integration into other projects.

jsmn (pronounced like 'jasmine') is a minimalistic JSON parser in C. It can be easily integrated into resource-limited or embedded projects. Most JSON parsers offer you a bunch of functions to load JSON data, parse it and extract any value by its name. jsmn proves that checking the correctness of every JSON packet or allocating temporary objects to store parsed JSON fields often is an overkill.

Jsmn - World fastest JSON parser/tokenizer

MsQuic is a Microsoft implementation of the IETF QUIC protocol. QUIC, a UDP-based, stream-multiplexing, encrypted transport protocol. It is cross-platform, written in C and designed to be a general purpose QUIC library. MsQuic also has C++ API wrapper classes and exposes interop layers for both Rust and C#.
 
QUIC has many benefits when compared to existing "TLS over TCP" scenarios:
<ul>
<li>All packets are encrypted and handshake is authenticated with TLS 1.3.</li>
<li>Parallel streams of (reliable and unreliable) application data.</li>
<li>Exchange application data in the first round trip (0-RTT).</li>
<li>Improved congestion control and loss recovery.</li>
<li>Survives a change in the clients IP address or port.</li>
<li>Stateless load balancing.</li>
<li>Easily extendable for new features and extensions.</li>
</ul>

MsQuic is a Microsoft implementation of the IETF QUIC protocol. QUIC, a UDP-based, stream-multiplexing, encrypted transport protocol. It is cross-platform, written in C and designed to be a general purpose QUIC library. MsQuic also has C++ API wrapper classes and exposes interop layers for both Rust and C#.

MsQuic -  Cross-platform, C implementation of the IETF QUIC protocol, exposed to C, C++, C# and Rust

Expat is an XML parser library written in C. It is a stream-oriented parser in which an application registers handlers for things the parser might find in the XML document (like start tags). This project aims to maintain Expat for both current and future users while improving the API to allow more reliable and robust access from "scripting" languages such as Python and Perl. Expat is one of the fastest non-validating XML parsers.

Expat is an XML parser library written in C. It is a stream-oriented parser in which an application registers handlers for things the parser might find in the XML document (like start tags).

Expat

PuTTY is a free implementation of Telnet and SSH for Windows and Unix platforms, along with an xterm terminal emulator. It is written and maintained primarily by Simon Tatham.

Putty

KiTTY is an open source alternative to Putty. KiTTY is a fork from version 0.60 of PuTTY, the best telnet / SSH client in the world. KiTTY is only designed for the Microsoft Windows platform. Its feature include
 <UL>
	<LI>Running a locally saved script on a remote session </LI>
	<LI>SSH Handler: Internet Explorer integration</LI>
	<LI>Binary compression </LI>
	<LI>Clipboard printing </LI>
	<LI>A light chat server is hidden in KiTTY </LI>
	<LI>A hidden text editor is integrated into KiTTY </LI>
	<LI>Shortcuts for pre-defined command </LI>
	<LI>The session launcher </LI>
	<LI>Quick start of a duplicate session </LI>
	<LI>Protection against unfortunate keyboard input </LI>
	<LI>An icon for each session </LI>
 </UL>

KiTTY is an open source alternative to Putty. KiTTY is a fork from version 0.60 of PuTTY, the best telnet / SSH client in the world. KiTTY is only designed for the Microsoft Windows platform.

Kitty

This is a parser for HTTP messages written in C. It parses both requests and responses. The parser is designed to be used in performance HTTP applications. It does not make any syscalls nor allocations, it does not buffer data, it can be interrupted at anytime. Depending on your architecture, it only requires about 40 bytes of data per message stream (in a web server that is per connection). 

http-parser - http request/response parser for c

H2O is a new generation HTTP server that provides quicker response to users with less CPU utilization when compared to older generation of web servers. Designed from ground-up, the server takes full advantage of HTTP/2 features including prioritized content serving and server push, promising outstanding experience to the visitors of your web site. 

H2O - the optimized HTTP/1, HTTP/2 server

XML Security Library provides support for XML Digital Signature and XML Encryption. It is based on LibXML/LibXSLT and can use practicaly any crypto library (currently there is "out of the box" support for OpenSSL, GnuTLS and NSS). 

XML Security Library is a C library based on LibXML2.

XML Security Library

Lua is a powerful, fast, lightweight, embeddable scripting language. Lua combines simple procedural syntax with powerful data description constructs based on associative arrays and extensible semantics. Lua is dynamically typed, runs by interpreting bytecode for a register-based virtual machine, and has automatic memory management with incremental garbage collection, making it ideal for configuration, scripting, and rapid prototyping. 

Lua - Embeddable Scripting Language. 

PortAudio is a free, cross-platform, open-source, audio I/O library.  It lets you write simple audio programs in 'C' or C++ that will compile and run on many platforms. It provides a very simple API for recording and/or playing sound using a simple callback function or a blocking read/write interface. Example programs are included that play sine waves, process audio input (guitar fuzz), record and playback audio, list available audio devices, etc.

PortAudio - Cross-platform Audio I/O Library

GoAccess is an open source real-time web log analyzer and interactive viewer that runs in a terminal on *nix systems or through your browser. It provides fast and valuable HTTP statistics for system administrators that require a visual server report on the fly. It supports nearly all web log formats (Apache, Nginx, Amazon S3, Elastic Load Balancing, CloudFront, etc) 

GoAccess - Real-time web log analyzer and interactive viewer that runs in a terminal in *nix systems or through your browser

FreeRTOS is an open source, real-time operating system for microcontrollers that makes small, low-power edge devices easy to program, deploy, secure, connect, and manage. This includes securely connecting your small, low-power devices to AWS cloud services like AWS IoT Core or to more powerful edge devices running AWS IoT Greengrass. FreeRTOS is built with an emphasis on reliability and ease of use.
 
A microcontroller contains a simple, resource-constrained processor that can be found in many devices, including appliances, sensors, fitness trackers, industrial automation, and automobiles. Many of these small devices can benefit from connecting to the cloud or locally to other devices, but have limited compute power and memory capacity and typically perform simple, functional tasks. Microcontrollers frequently run operating systems that may not have built-in functionality to connect to local networks or the cloud, making IoT applications a challenge. FreeRTOS helps solve this problem by providing the kernel to run low-power devices as well as software libraries that make it easy to securely connect to the cloud or other edge devices, so you can collect data from them for IoT applications and take action.

FreeRTOS is an open source, real-time operating system for microcontrollers that makes small, low-power edge devices easy to program, deploy, secure, connect, and manage. This includes securely connecting your small, low-power devices to AWS cloud services like AWS IoT Core or to more powerful edge devices running AWS IoT Greengrass. FreeRTOS is built with an emphasis on reliability and ease of use.

Amazon FreeRTOS - Cloud-native IoT operating system for microcontrollers

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