Anything and everything open-source, even by FOSS standards

After a 21-year long era since GIMP 2.0 and 7 long years since GIMP 2.10 .GIMP has had what some might describe as their very own Blender 2.8 moment, but for image editing instead of uh, literally everything else, including the blending of food that Blender does, or at least that's what used to come up when I searched for blender. This update is all about transforming cat memes image editing with the following:

• Need to tweak a filter you applied hours ago? New in GIMP 3.0 is non-destructive editing for most commonly-used filters (see the changes in real time with on-canvas preview).
  
• Exchange files with more applications, including BC7 DDS files as well as better PSD export and many new formats.
  
• Don’t know how big to make your drawing? Simply set your paint tool to expand layers automatically as needed.
  
• Making pro-quality text got easier, too (style your text, apply outlines, shadows, bevels, and more, and you can still edit your text, change font and size, and even tweak the style settings).
  
• Organizing layers has become much easier with the ability to select multiple items at once, move them or transform them all together!
  
• Color Management was improved (more extensive support for RGB color spaces beyond sRGB).
  
• Updated graphical toolkit (GTK3) for modern desktop usage (better UI scaling on HiDPI screens, better support for graphics tablet input, native Wayland support, etc).