There are 2 repositories under platform-independent topic.
Open source simulator for autonomous vehicles built on Unreal Engine / Unity, from Microsoft AI & Research
An open-source post-exploitation framework for students, researchers and developers.
Python REMote Interface library. Platform independent. In about 100 Kbytes, perfect for your diet.
The file management automation tool.
Bluetooth Low Energy platform Agnostic Klient for Python
The Felix Programming Language
SymmetricDS is database replication and file synchronization software that is platform independent, web enabled, and database agnostic. It is designed to make bi-directional data replication fast, easy, and resilient. It scales to a large number of nodes and works in near real-time across WAN and LAN networks.
Platform-independent drivers for STMicroelectronics MEMS motion and environmental sensors, based on standard C programming language.
Highly portable C system library: threads and synchronization primitives, sockets (TCP, UDP, SCTP), IPv4 and IPv6, IPC, hash functions (MD5, SHA-1, SHA-2, SHA-3, GOST), binary trees (RB, AVL) and more. Native code performance.
Malagu is a Serverless First, componentized, platform-independent progressive application framework based on TypeScript.
:video_game: JVM game engine based on Swing/JavaFX.
A small platform independent library making it simple to create and stop new processes in C++, as well as writing to stdin and reading from stdout and stderr of a new process
C99 Game Library. XNA-like. Single source. Platform Independent. Allocator Aware.
An Open-Source port of the 1999 Game "Star Wars Episode 1: Racer"
A collection of LLVM transform and analysis passes to write shellcode in regular C
The CIDLib general purpose C++ development environment
Virtual Reality Software Library
A C++ library to look for special directories like "My Documents" and "%APPDATA%" so that you do not need to write Linux, Windows or Mac OS X specific code
No longer maintained, actually usable implementation of NEAT
A simple header-only, single-file library to handle WGS84 coordinate to Cartesian coordinate transformations for C++.
It's a Docker Environment of the KALI-linux having all the required tool for VAPT.
Control tool for the GQ GMC Geiger Counters.
Cross platform package manager wrapper
An AutoIt interpreter and runtime package written in Go
Awesome C99, Header-Only, rayfork wrapper for raylib!
Email Marketing Software
A C# AutoIt interpreter designed to be platform-independent
Memory Manager - Fast, Scalable and Easy to use
A simple header-only, single-file string toolbox library for C++.
Cross-platform Bluetooth Low Energy Server Python Library
Syslog client for python (RFC 3164/5424)
Open Source Project. Developed under SiB Community.
A simple MQTT client written in go that subscribes to a configurable list of MQTT topics on the specified broker and executes a given shell script/command whenever a message arrives.