There are 2 repositories under portable-library topic.
canonical libwebsockets.org networking library
Ada 2022 bindings to SDL 2
.NET API client for the InterPlanetary File System (IPFS)
Portable driver for Semtech SX126x series
Lightweight and easy to merge Modbus RTU Slave library for microcontrollers
Portable driver for Semtech SX128x series
Standard Bourne-like, POSIX-compliant shell functions library for developers.
Xamarin Sample app to call GitHub repos real time, along with offline support
A game (for Android and iOS) using Xamarin, CocosSharp 2D game , C# DOTNET, Android, IOS, Portable Libraries. MONO Game.
:zap: A portable library for fetching Google Search suggestions for .NET applications.
Really banal, but portable TTS speech synthesis library written in C.
Easily download/update portable applications in restricted environments.
A compact library with utility methods that are Java/C# compatible. Available on Java and .NET
callback_printf allows the implementation of portable sprintf, snprintf, vsprintf and vsnprintf like output functions. The code includes wrappers for those functions. It supports all formats of the C 11 standard. wchar_t arguments and strings are printed as UTF-8. It's pretty fast, threadsafe and has no dependencies to other libraries.
Santi's Random Number Library. Official repo for @santi100/random-lib on NPM.
A simple library that supplements the simple C programming experience!
Portable computational core. It simulates batches of turing machines referenced in the complete enumeration.
Embedded MQTT Client Library written in C Language
.Net Portable class library project demo
Connect from Cross Platform .NET C# applications to mikrotik router via ADO.NET like API or enjoy O/R mapper like highlevel api.