My resource links that I have come across over the years

I will add more as I have time. I have a lot of links to share

Windows
WinAPI
API Guide
WinAPI Viewer
Everything - I doubt you'll find a better search utility
ZTree - XTreeGold alternative for Windows
Midnight Commander file manager
Game Extractor and other open source projects - Windows, android and game consoles

Emulators
Amiga Forever
AmigaOS

Install Makers/Creators
Inno Setup
InstallForge

Old Windows versions (Windows Update) - Also works with Windows 10 and 11
Legacy Update

Linux Operating Systems
Ubuntu
Ubuntu flavors
Mint
Debian
Puppy Linux
Manjaro
Zorin OS - My personal favorite - (based on Ubuntu)

VM's
VirtualBox and VMware images
Multiple Linux versions VirtualBox and VMware images

Mac OS X Resources
Dash - Mac OS X api
Apple ID

Programming Languages
PureBasic - Cross platform
SpiderBasic - Cross platform
AppGameKit - Cross platform
Python - Cross platform
Visual Studio
Github Copilot and Visual Studio 2022
Visual Studio C++
Ruby
LuaJit - Cross platform
Lua - Several platforms

Programming Editors/Compilers
Code::Blocks

Reverse Engineering Software
IDA
CFF Explorer

All Operating Systems Resources
The free country
Avast Decompiler, Avast decompiler Github
Audacity
Benchmarking Software
Old operating systems, applications, games and more
Scintilla
Syntax highlighting

Database Software - (Open source- Multi-platform)
Postgresql
SQLite
DB Browser

Fonts
Old School Fonts

Icons
Free and Paid Icons

Game Engines
Unity
Unreal Engine
Godot Engine
Wiki large list of game engines
CryEngine
Irrlicht Engine

Development Asset Resources
Reiner's Tilesets
Textures

3D Modeling Software
bforartists
blender
Wings3D
fragMOTION

Art/Image Editing Software
GIMP