Post here some handy links to free game development resources for your fellow Game Jam participants.

Some resources to help you started:

• Blender, for 3D  models and can also do 2D and/or sculpting: https://www.blender.org
• Freesound.org: https://freesound.org | License: https://freesound.org/help/faq/#wait-this-is-all-free
• 8bit Sound Generator: https://www.bfxr.net/ | License: You have full rights to all sounds made with bfxr, and are free to use them for any purposes, commercial or otherwise.
• Kenny Assets: https://kenney.nl/assets | License: CC0 1.0 Universal
• Color Scheme Generator: http://colormind.io/
• Color Scheme Designer: https://paletton.com/
• Open Game Art: https://opengameart.org | License: https://opengameart.org/content/faq#q-how-to-credit
• Piskel,  a free online editor for animated sprites & pixel art:  https://www.piskelapp.com/
• Mixamo, animations: https://www.mixamo.com/
• Tree It, free tree creation tool: http://www.evolved-software.com/treeit/treeit 
• WOWIE Asset Pack (by Jonas Tyroller): https://jonas-tyroller.itch.io/wowie-pack
• LabChirp, a powerful and versatile sound effect generator: https://labbed.itch.io/labchirp
• Kay Lousberg free Game Assets: https://kaylousberg.com/game-assets
• ChipTone, a free tool for generating sound effect: https://sfbgames.itch.io/chiptone | License: All sounds created using ChipTone are free to use for any purpose, commercial or otherwise, under the CC0 licence. 
• Beepbox, BeepBox is an online tool for sketching and sharing instrumental music: https://www.beepbox.co
• Material maker, for procedural materials: https://rodzilla.itch.io/material-maker
• Audacity for editing audio: https://www.audacityteam.org
• Game idea generator, for if you're completely stuck on an idea: http://ygd.bafta.org/resources/game-idea-generator
• Ship Mixer, create ships that perfectly fit the shmup style:  https://kenney.itch.io/ship-mixer (License see link)
• Creature Mixer, create characters that perfectly fit the platformer style:  https://kenney.itch.io/creature-mixer (License see link)

Some amazing free CC0 low poly places/characters/props: https://elbolilloduro.itch.io/

And a collection of low poly stuff: https://github.com/Miziziziz/Retro3DGraphicsCollection

Someone suggested useful tool on our Discord: https://www.codeandweb.com/texturepacker (SPRITE SHEET PACKER. Create sprite sheets and optimize your game graphics. Works with any game engine).