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:

F3D

F3D is an Open-source cross-platform 3d viewer
Windows, Mac, Linux

Features:

Docs

Config files path: C:\Program Files\F3D\share\f3d\configs\config.d\

Set windows position and size options:

	  "resolution": "1400,1000",
	  "position": "1100,500"

Other oiptions docs

Image Glass

ImageGlass is an open-source, ad-free photo viewer that supports 80+ formats, color-managed

Features:

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:

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