Various apps
Useful viewers and editing tools, mostly free and open-source
TOC
DJV
DJV is an open-source cross-platform application for playback and review of image sequences. DJV can playback high resolution image sequences in real time, with audio, A/B comparison, and color management.
Windows, Mac, Linux
Features:
- Support for high resolution and high bit depth images
- A/B comparison with wipe, overlay, and difference modes
- Timeline support with OpenTimelineIO
- Color management with OpenColorIO
- Multi-track audio with variable speed and reverse playback
- Experimental support for USD files
- Available for Linux, macOS, and Windows

F3D
F3D is an Open-source cross-platform 3d viewer
Windows, Mac, Linux
Features:
- view 3d models with animation and materials
- usd support
- gaussian splatting support
- volume rendering
- thumbnailing for windows
Config files path: C:\Program Files\F3D\share\f3d\configs\config.d\
Set windows position and size options:
"resolution": "1400,1000",
"position": "1100,500"

Image Glass
ImageGlass is an open-source, ad-free photo viewer that supports 80+ formats, color-managed
Features:
- 80+ formats supported
- Simple editing tools
- Color managed
- Exif tool integration

MPC-HC
Media Player Classic very active fork
Lossless Cut
Lossless Cut The Swiss Army Knife of Lossless Video/Audio Editing
Cross-platform: Windows, Mac, Linux
Features:
- Losslessly trim or cut out parts of video/audio
- Lossless merge/concatenation of arbitrary files (identical codec parameters)
- Lossless stream editing: Combine arbitrary tracks from multiple files
- Losslessly extract all tracks from a file
- Remux into any compatible output format
- Take full-resolution snapshots from videos in JPEG/PNG format
- Apply a per-file timecode offset in the preview
- Change rotation/orientation metadata in videos
- Powerful timeline with zoom and frame/keyframe jumping
- Auto-saves per project cut segments to file
- View ffmpeg last command log so you can modify and re-run modify recent commands on the command line
- Give labels to cut segments
- Segment panel showing segments with details, export/import cut segments as CSV
- Video thumbnails and audio waveform

Allusion
Allusion is a free and open source desktop application for managing your visual library
Allusion hasn't been updated for a while and there's this more active fork OneFolder

Ocenaudio
Cross-platform audio editor Ocenaudio
Windows, Mac, Linux (Debian, Ubuntu, Rocky Linux, Fedora, Arch, )

InstaMAT
InstaMAT is a powerful 3d materials platform. Windows & Mac.
Pioneer license is free (under $100k revenue, requires attribution)
Download

Resilio Sync
Personal file sync and share powered by P2P
Cloudless P2P syncing across multiple devices (Windows, Mac, Linux, Android, iPhone, NAS)
Easily Send Big Files to anyone
Very flexible

Hints:
- Set sync delay per file type: edit
C:\Users\user_name\AppData\Roaming\Resilio Sync\FileDelayConfig - File pattern ignore list is for each synced folder: edit
\.sync\IgnoreList
Restart sync after saving