GIMP is a digital photo manipulation tool for Windows (and many other platforms) that's considered to be the open source (free) answer to Adobe Photoshop. GIMP is amazingly expandable and extensible.
GIMP 2.10 Tutorials
GIMP 2.99.2 released with GTK 3 UI and Wayland support - Neowin
GIMP 2.9/2.10 Feature Preview — Tutorials —
What's New in GIMP 2.10.34
What's New in GIMP 2.10.4
How to add Neon Glow effect Text in GIMP
GIMP 2.9/2.10 Feature Preview — Tutorials —
GIMP 2.10.34 is out! JPEG-XL Export & 3.0 Dev Backports [Ubuntu PPA]
GIMP 2.8.20 - Neowin
What's New in GIMP 2.10.34