Links

Frontend Development

Sizzy Browser: A web browser customized for frontend developers. It has useful and accelerating features such as being able to show a change you made on multiple device resolutions at the same time.

0.A.D.: Real-time strategy game similar to Age Of Empires.
Julius: Open source rebuilt version of Julius Caesar III game. It can run on many platforms.
OpenRA: Open source and modern rewrite of OpenRa Red Alert game. All operating systems support Linux, OSX and Windows.
A Dark Room: A text-based adventure game that starts off simple but gradually becomes more intricate and immersive.
Z Type: The best typing speed game I've ever seen.
Business Tour: An online Monopoly-like game; we played it a lot with friends during the pandemic.

Elevator Saga: A coding game where you program the behavior of an elevator using JavaScript. In each level, you modify the elevator's behavior to transport the target number of people to their desired floors.
Untrusted: A roguelike game where you need to modify the game's code to progress through the levels. (Javascript)
Vim Golf: Various puzzles to develop skills in Vim.
Vim Adventures: I think this is a great game that can make learn to use vim.

(Yea I'm diagnosed too)

chiptune.app/ Great collection of mod, xm, s3m and midi files. You can also login and bookmark the ones you like.
Dubmood Music Youtube channel of famous chiptune musician.

Http Status: A website that lists all HTTP status codes. Also you can test them here.
Layout Patterns: A must-have resource for front-end development that lists the most commonly used CSS patterns—perfect to refer to whenever you're stuck.
Lua Cheatsheet

DeepJs: The free online version of the book Deep JavaScript: Theory and Techniques written by Dr. Axel Rauschmayer.

Guard.io: Helps you to organize, share, track and bookmark any link on the web.
Typora: A markdown-based note-taking app that provides a highly enjoyable experience both as a reader and a writer. It removes the preview window, mode switcher, syntax symbols of the markdown source code, and all other unnecessary distractions. Instead, it features a real live preview that helps you concentrate on the content itself. It made me switch from Notion. The only downside is that it isn't free (it costs $14).