Btw, in case it’s not clear, click the picture to see a much longer list.
Very good freeware list!
Already extensively using Gimp and Inkscape … each with their own strengths and foibles.
Big thumbs up here for Audacity. It is my #1 go-to post-processing audio tool. For example, I do a lot of work in Propellerhead’s Reason 10 then use Audacity to convert to MP3 format.
I have also used Audacity extensively, for Lightning research.
Sorry didn’t include it, as it was not related to watchface design …
Cool list! If you guys can share one that includes links to download, we can add it to our “Resources” Help section: Resources – How can we help?
That sounds cool Andrew 
Links current as of 2/11/19:
3D Modeling/Animation (Complex) - http://www.blender.org
3D Modeling (Simple) - http://www.sketchup.com
3D Modeling (Voxel/Brick) - Magicavoxel - Voxelmade
3D Modeling (Digital Clay Sculpting) - Pixologic :: Sculptris
3D Modeling (in VR) - https://vr.google.com/blocks/
Human 3D Model/Armature Generator - http://www.makehumancommunity.org/
Photo Editing/Manipulation - https://www.gimp.org/
Digital Painting/Comics - Krita | Digital Painting. Creative Freedom.
Vector Art (Like Illustrator) - https://inkscape.org/
Storyboarding - Storyboarder - The best and easiest way to storyboard. | Wonder Unit
Video Game Engine - https://unity3d.com/
Visual Novel Maker w/ No Code - http://fungusgames.com & https://unity3d.com/
Text Based Game - http://twinery.org/
Audio/Sound Recording/Editing - https://www.audacityteam.org/
Sheet Music Notation - Free music composition and notation software | MuseScore
Retro Game Music Maker - https://boscaceoil.net/
Retro Video Game Effects Generator - https://www.bxfr.net/
Screen & Webcam Recording - https://obsproject.com/
Live Streaming (Twitch/Youtube) - https://streamlabs.com/
Video and Audio Converter - https://handbrake.fr/
2D Animation (Cutout) - http://dragonbones.com/en/index.html/ & https://www.synfig.org/
2D Animation (Drawn) - Animation & Rigging — blender.org & OpenToonz
Stick Figure Animation - https://pivotanimator.net/
Stop Motion/Claymation - https://www.cateater.com/ [Mobile devices only]
Video Editing - Animation & Rigging — blender.org
Flashcards/Spaced Repetition Learning - https://apps.ankiweb.net/
Awesome Websites:
Distraction Free Writing - Writer, the Internet Typewriter
Script/Playwriting - https://storywriter.amazon.com/
Sound Effects Database - https://freesound.org/
Music For Film/Games - Incompetech: Royalty-Free Music
Pixel Art & Animation - https://www.piskelapp.com/
Textures and HDRIs For 3D - https://hdrihaven.com/
Fonts - https://fonts.google.com/ & https://www.1001freefonts.com/
Learn Coding - https://www.codecademy.com/
Simple Android App Maker - Redirecting…
Color Palette Generator - https://coolors.co/
Rhyme Dictionary - https://www.rhymezone.com/
Thanks for the helpful information. I was searching for the photo editing software link for my news portal eduhelphub.com from such a long time, and finally found it here. Great to have the link.
This is the first time I saw a mention of Inkscape in any forum. I really enjoy using it. Easy, free and so much to do with. Also I use Rhymezone for improving my vocabs and poem writing.
Free open source links that I use
3D graphics and animation - https://www.blender.org/
Audio editor - https://www.audacityteam.org/
Since I am a new member only 2 links are allowed to post at a time.
So the list continues…
Ad free torrent downloader - https://www.qbittorrent.org/
Report designer program - https://community.jaspersoft.com/
Other useful free links
Game developing platform for non coders - https://gdevelop.io/
Research writing - http://penmypaper.com/
Hello, welcome to forum. Since you mentioned the inkscape, it is first time I see somebody enjoying using it. I tried it earlier and used it once or twice since, but never enjoyed it. I admit it has plenty useful and advanced features and the value for being free is great. I just could not find proper way to use it efficiently. Whenever I wanted to snap to some points or make some transformation by numbers, not just by thumb, I struggled. Maybe I missed out some tutorial 
I am not a pro user of any graphics software, but you can say Inkscape is the starting point. I started designing minimal logos in it, including basic figurative and wallpaper art. In case if it helps you can go through the tutorials of Ryndon. He shares crystal clear tutorials of each and every tools of the open source softwares that are free to use. And in case he misses a tool, there is a good chance of him to upload the next video, if it is mentioned by anyone in the comment section. This is where I came to know about Inkscape.
Thanks for reminding me, those are really good tutorials.