A collection of links for practising and future game developers. Engines and art software, learning resources, assets, project management tools, services, et cetera.

Game engines

Recommended for beginners

• Construct 3: a freemium 2D engine with some 3D features, runs in the browser (and works offline too). It has a no-code event system, or you can develop in JavaScript or TypeScript. The free version is quite limited, but it's good for getting a general feel of the engine. The full version requires a subscription.
• GDevelop: A free 2D / limited 3D engine that is fairly similar to Construct. It has some optional paid features.
• GameMaker: this 2D engine has been along for a long time and it's free for non-commercial use. For commercial projects, you need to buy a very fairly priced license (one-time purchase).
• microStudio: Open source 2D engine, has a browser based and downloadable version too. Supports many programming languages, including its own Lua-like microScript language, as well as Lua, Python, Javascript, and Typescript.
• GB Studio: open source development environment for making GameBoy or GameBoy Color games, that can run on real hardware, emulators or in the browser. It has a block based no-code programming interface.
• Ct.js: open source 2D engine and development environment. Has a block based no-code interface called Catnip, or you can use JavaScript to code your game.
• Twine: open source engine for making interactive fiction games. Runs in the browser, requires no coding, but it can be extended with CSS and JavaScript.
• Bitsy: open source 2D no-code engine for making retro games.
• Whimtale: free 2D no-code engine inspired by Bitsy. It has browser based and downloadable versions as well.
• RPG in a Box: very fairly priced 2D/3D engine and editor primarily for making RPG games. It has a no-code interface with optional scripting support with its own Bauxite language.
• RPG Maker MZ / MV / VX / XP / etc: a family of 2D no-code engines for making RPGs. Requires a one time purchase, but most versions have 30 day free trials available.
• RPG Paper Maker: open source 2.5D engine inspired by RPG Maker. Its free for non-commercial use, making commercial games requires a fairly priced lifetime license.
• PuzzleScript: open source brower based 2D engine and scripting language for primarily for making retro puzzle / action games.
• Adventure Game Studio: an open source game engine actively developed since 1997, primarily for making point-n-click adventure games.

The big three

• Godot: popular open source 2D/3D engine. Can be programmed via its own Python-like GDScript language, or C#.
• Unity: popular commercial 2D/3D engine, with a massive community and array of learning resources. Can be programmed via a node based no-code interface, or C#. It has a free version and multiple subscription based plans with advanced features.
• Unreal Engine: free engine primarily for making 3D games. Can be programmed via Blueprint, a node based no-code interface, or C++.

A few more recommendations

• LÖVE: open source 2D engine based on the Lua language.
• PICO-8: commercial (but very fairly priced) Lua based 2D engine and "fantasy console" for making retro games.
• TIC-80: open source engine and "fantasy console", similar to PICO-8.
• quadplay✜: open source engine and "fantasy console", which can be programmed using its own language called PyxlScript.

Assets (2D / 3D graphics, sounds, music)

• Itch.io: an asset marketplace with tons of free and commercial 2D/3D art,  sound effects and music.
• OpenGameArt: free and mostly permissively licensed asset repository.
• Kenney, aka. Asset Jesus: an incredible collection of hand made CC0 licensed 2D and 3D assets, music, sound effects.
• Quaternius: CC0 licensed low poly 3D models.
• PolyPizza: free and mostly permissively licensed 3D low poly asset repository.
• Share Textures: a collection of CC0 licensed textures.
• Poly Haven and ambientCG: a collection of CC0 licensed 3D models and textures.
• 99Sounds: a collection of free to use sound effects.
• Lospec: a repository of pixel art palettes and tutorials.
• Incompetech: CC-BY licensed music by Kevin MacLeod.
• Freesound: free and mostly permissively licensed sound effect repository. Downloading requires a free account.
• FontSpace and Google Fonts: free and mostly permissively licensed fonts.
• Google Webfonts Helper: alternative Google Fonts frontend for downloading fonts in specific formats (woff, woff2, ttf, otf, eot, svg).
• Pixabay: a repository of free nad permissively licensed 2D, 3D, vector graphics, sound and music assets.
• Game-icons.net: a huge collection of two-color SVG icons available under CC-BY 3.0 license.
• sfxr, bfxr, jfxr, jsfxr: open source sound effect generators
• Chiptone: free sound effect synth
• LabChirp: free cross-platform sound effect synth

Project management & collaboration

• Trello: kanban-style freemium project management tool.
• Miro: "infinite board" type freemium collaboration tool.
• Notion: freemium tool for collaboration.
• Obsidian, Logseq: popular open source apps for knowledge bases, planning, note taking, documentation, et cetera.

Learning resources

• Red Blob Games: free interactive visual explanations of math, algorithms and game mechanics.
• Game UI Database: game UI reference for designers.
• Coffee with Butterscotch: a gamedev comedy podcast by Butterscotch Shenanigans, an indie game studio, equally hilarious and insightful.
• Pixel Art Tutorials: incredible animated pixel art tutorials by Pedro Medeiros (Saint11).
• Omnicalculator: learning resource and interactive calculators.
• Game Feel Demo by Deepnight Games: an interactive demonstration of a lot of ways to add "juice" to a game.
• Game Programming Patterns (Robert Nystrom): free resource on video game programming practices.
• Ten Minute Physics: excellent explainers on various 2D and 3D physics simulations of rigid bodies, soft bodies, fire, fluids, cloth, et cetera.

Marketing tools

• Blue Pin Studio's tools: awesome free market research tools using data scraped from Steam
• Video Game Insights: Steam market research tool

If you like this list, be sure to check out a similar collection by clovelt, which also contains resources on business, marketing and publishing.