Free Software Alternatives

Here's some links to free software applications, If you find any more post them here and I'll add them to the list. This list is checked and updated every so often, but if you find a dead or outdated link in the list let me know.

2D

Sketchbook - sketchbook.com/
MediBang Paint - medibangpaint.com/en/
Gimp - www.gimp.org/
Gimpshop - www.gimpshop.com/
Krita - krita.org/
MyPaint - mypaint.org/
Paint.net - www.getpaint.net/
Verve - www.taron.de/forum/
Alchemy - al.chemy.org/download/
Inkscape - inkscape.org/en/
Microsoft Expression Design 4: expressiondesign4.com/
Vectr (vector drawing app - also available as a browse based application) - vectr.com/
Artweaver - www.artweaver.de/en
Pixia - www.bestfreewaredownload.com/freeware/k-...eeware-ethqanyg.html
Milton (infinite canvas drawing/sketching app): www.miltonpaint.com/
FireAlpaca (free alternative to Clip Studio Paint): firealpaca.com/

Photo/Image Processing

Photoscape X (Photo editor, filters, batch processing RAW etc - Free and commercial versions)) - x.photoscape.org/
darktable (opensource RAW developer, photo processing - Lighroom style) - www.darktable.org
LightZone (opensource Lightroom alternative) - lightzoneproject.org
RawTherapee (Free RAW processor - another Lightroom style app) - rawtherapee.com
Photo Pos Pro: www.photopos.com/PPP3_BS/Photo-Pos-Pro-Free-Photo-Editor.aspx

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Browser based 2D

Muro - muro.deviantart.com/#skins
Pixlr - pixlr.com/editor/
Harmony - mrdoob.com/projects/harmony/
Scribbler Too (requires Flash Player ) - www.zefrank.com/scribbler/scribblertoo/
Method Draw - editor.method.ac/
Project Shapeshift - shapeshifter.io/

Vectr (vector drawing app - also available as a downloadable application) - vectr.com/new
Gravit Designer (Vector) - designer.io/

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2D Animation

Storyboarder (opensource storyboarding application): wonderunit.com/storyboarder/ 
OpenToonz - opentoonz.github.io/e/
Morevna (Opentoonz fork with additional/alternative features) - morevnaproject.org/opentoonz/
Tahoma (Currently in beta - simpler friendlier alternative Opentoonz fork) - tahoma2d.org/download/
LibreSprite (Opensource Pixelart painting and animation) - github.com/LibreSprite/LibreSprite/releases
Synfig Studio - www.synfig.org/
MonkeyJam (fairly old pencil test and Stop motion program) - monkeyjam.org
Pencil2D - www.pencil2d.org

Video Editing/Effects/Compositing

Davinci Resolve (commercial app, free version with some limitations - Editing, compositing, audio etc.) - www.blackmagicdesign.com/products/davinciresolve/
Ebsynth (Create NPR painted style effects in video) - www.ebsynth.com/
Fusion: www.blackmagicdesign.com/products/fusion
Autodesk Composite (No longer developed): apps.exchange.autodesk.com/MAYA/en/Detai...osite_windows64%3aen

Screen capture

Open Broadcaster (screen recording/live streaming) - obsproject.com/
MS Expression Encoder 4 - www.microsoft.com/en-us/download/details.aspx?id=27870
CamStudio - camstudio.org/

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3D

Blender - www.blender.org/
Bforartists (fork of Blender with redesigned "friendlier" interface) - www.bforartists.de/
Meshmixer - meshmixer.com/
Sculptris - pixologic.com/sculptris/features/
Hexagon - www.daz3d.com/hexagon-3d-modeling-free
Sketchup - www.sketchup.com
Wings3D - www.wings3d.com/
Strata 3D SE - www.strata.com/design-3d-se-our-entry-le...3d-modeler-now-free/
GAEA (3d landscape generator, limited free version available) - quadspinner.com/Gaea
TerreSculptor (3D landscape generator) - www.demenzunmedia.com/home/terresculptor/
Quixel Mixer (free 3d texture creation and painting)- quixel.com/mixer
Material Maker (free open source material/texture creation tool Substance Designer like) - www.materialmaker.org/
Materialize (PBR Texture creation tool - Windows only) - boundingboxsoftware.com/materialize/
Mixamo (free online auto character rigging and mocap animation tool) - www.mixamo.com
ActorCore accuRig (free auto character rigging tool) - actorcore.reallusion.com/auto-rig?
MakeHuman - www.makehuman.org/
Daz Studio - www.daz3d.com/get_studio
VRoid (Japanese pose reference tool for manga artists) - vroid.com/download/

SculptGL - stephaneginier.com/sculptgl/
Strata Sculpt 3D - www.strata.com/sculpt3d/

Meshroom (Free photogrammetry/camera tracking application) - alicevision.github.io/
Agisoft De-lighter (free tool for removing lighting information from photos for texture creation) - www.agisoft.com/index.php?id=71

CAD:

Freecad - freecadweb.org/
Tinkercad (browser based - requires account registration) - www.tinkercad.com/
OnShape (browser based, free version with some limitations) - www.onshape.com/
DesignSpark Mechanical (registration required) - www.rs-online.com/designspark/electronics/eng/page/mechanical
BricsCAD Shape - www.bricsys.com/bricscad-shape

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Reference Image Utilities

Kuadro - kruelgames.com/tools/kuadro/
RefShelf - renderstuff.com/tools/refshelf/
PureRef - www.pureref.com/download.php (enter custom price of 0 for free download - although it is pretty cheap anyway)

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Game engines

(Check licensing terms - some require payment based on earnings)

Unreal4: www.unrealengine.com/en-US/what-is-unreal-engine-4
Unity: unity3d.com/unity
Godot (open source) - www.godotengine.org/
Stride (formerly Xenko) - stride3d.net/
Defold (free, oriented toward web and mobile games) - defold.com
Unigine engine community edition (free version of commercial engine) - unigine.com/products/community/advantages/
Cocos Creator - www.cocos.com/en
O3DE (Formerly Amazon Lumberyard, now Opensource) - o3de.org/

Don't know why I hadn't added Artweaver, but I have now.

Both strangely forgotten in the rush, both now added.

edtuckerartist wrote:

3D Minecraft (can be used to create quick refrence builds ) minecraft.net/