GIMP

What's new in this version:

Core:
- Disable Arbitrary Rotation menus (under both Image and Layer menus) if no image is active, for consistency
- New gradient available: FG to Transparent (Hardedge) gradient

A change in linuxwacom made some graphics tablet crash GIMP. Though the issue is in the driver (downgrading it "fixes" the issue), it was bad enough that a workaround was also added in GIMP code so that we don't crash with the newer driver. A fix was also merged on linuxwacom itself:
New palette import supports:
- Adobe Swatch Exchange (ASE)
- Adobe Color Book (ACB)
- Generated Brush previews are now rotated clockwise with the brush angle, which goes against the documentation. Nevertheless this is how angles were used on canvas in the 2.10 branch until now, so to avoid breaking existing workflows while having consistent preview, we chose to follow actual on-canvas usage over documentation. It may be re-evaluated for GIMP 3.

Tool:
Text tool:
- When replacing a selection, take and apply markup (if any) from the first character of the selection for the entered text. This fixes the case when you no longer can change the global layer text properties after replacing the text.
- Set the blank font name for the standard font instead of 'Standard' to fix the issue when 'Standard' can be actual font from the list or a font which starts with (e.g. Standard Symbols PS)

User Interface:
Item tree view lock boxes:
- now separately themable with gtkrc
- showing a white frame when hovering over lock buttons
- showing a small padlock next the lock icon when it's active
- Add Table of Contents to User Manual submenu (in Help menu)

Plug-ins:
Fixed vulnerabilities:
- DDS: ZDI-CAN-22093
- PSD: ZDI-CAN-22094
- PSP: ZDI-CAN-22096 and ZDI-CAN-22097
- JPEG-XL: support libjxl v0.9 decoding API
- Metadata editor: more DigitalSourceType values
- PDF are now loaded at 300PPI by default

GIF:
- Added support of non-square aspect ratio by setting different vertical and horizontal resolution when a loaded file has the PixelAspectRatio metadata set
- Various more file format fixes (at least GIF, PDF import, HEIF/AVIF, JPEG XL, XWD, DDS) and various fixes in non-file format related plug-ins too
- Image Map: HTTPS scheme now accepted in the URL field

Libgimpbase:
- Do not save Photoshop specific EXIF metadata when exporting images because they can contain sensitive data and we cannot update them
- We now update Exif.Photo.PixelX/YDimension Exif tags when resizing and exporting (but only if they were already present, as they are non-essential)

Translation:
- 20 translations were updated: Belarusian, Catalan, Chinese (China), Danish, Dutch, Georgian, German, Greek, Hungarian, Icelandic, Italian, Lithuanian, Polish, Portuguese, Romanian, Slovenian, Spanish, Swedish, Turkish, Ukrainian

Build:
- Added code in the Windows installer script for the ARM 64-bit build, bundled into the same universal installer (though the first experimental installer with Aarch64 support was for GIMP 2.10.34 revision 2)