This is a small list of the most useful links I've found on the web. No sponsored links, no friendly links, just those I really and personally think are of real use or quality.
Browser Tools
Development - Databases
Development - General
- ASCIIflow: Create ASCII flow diagrams, handy for code comments
- Appropriate Process (Patterns)
- Code snippets web compiler & runner: Supports many languages like C#, Java, Perl, PHP...
- Coding Katas:
- Solveet: List of katas (in Spanish)
- Conway's Game of Life rules
- RPG Combat Kata
- CodingDojo.org Katas
- Design Patterns
- DiffChecker: Online text diff tool
- Enterprise Integration Patterns
- Git Cheatsheet: Maintained by myself, I add from time to time basic or handy commands
- GitHub: The best place to find and host opensource projects
- Hexed: Online Hexadecimal editor
- High Scalability
- Martin Fowler
- Mermaid: Markdown-like script language for generating charts. Online editor available
- OverApi: Collection of cheatsheets about languages, tools, operating systems...
- PlantUML: Online UML editor, based on a very simple syntax
- Programmers StackExchange
- Project Euler
- RegExr: Online regular expression builder
- Regular Expressions + Regular Expression Library: Theory about regular expressions
- Sourcemaking: Tons of Design Patterns, Anti-Patterns, Refactoring and UML
- StackOverflow
- Sublime Text Cheatsheet: Personal cheatsheet with most useful commands from this Editor
- The Twelve-Factor App: A methodology to build software-as-a-service applications
- typing.io: Learn to type in different languages, all online and with a simple yet powerful interface
- yEd: Freeware Graph editor,much like Microsoft Visio, and thus perfect for UML diagrams
Development - Javascript
- Google Closure Compiler: Online Javascript compressor/minimizer
- Javascript Beautifier
- JSBin: Online Javascript & HTML editor with live preview, saving and sharing functionalities
- JSON Parser: A simple yet clear JSON parser and tree data viewer
- Json Formatter & Validator
Development - PHP
- Awesome PHP: Curated list of PHP libraries and resources
Development - Python
- Awesome Python: Curated list of Python frameworks, libraries, software and resources
Development - Ruby
- Online documentation: Helpful as a quick visual reference
Development - Web
- CanIUse: Great "term finder", displaying charts of browser compatibility for any web-related term (CSS, Javascript,...)
- CSS, Javascript and HTML online compressor
- Mobile HTML5 compatibility chart
- Mozilla Developer Network: Awesome compilation of all-things-related web development: Javascript, HTML, CSS... One of my late favourites.
- Javascript Toolkit: Javascript-based toolkit: URL, HTML & Base64 Encoder & Decoder; Minimizer; SHA-1 & MD5 Hashing.
- Postman: An incredibly useful REST client, must have tool for API development and testing.
- Webmasters StackExchange
Game Development
- Amit's Game Prog.
- Fabien Sanglard's website
- Gamasutra
- Game Programming Wiki
- GameDev
- How OpenGL Works: A series of lectures on how to build a small software renderer that replicates OpenGL
- NeHe Productions
- PCG Wiki
- Game FileFormat Central
Graphics & Design
- Canva Learn: Learn about colors and their combinations
- Color Blender: Tool to generate blending colors
- COLOURLovers: Color schemes
- FreeDigitalPhotos.net: Free clipart and real photos free to use giving appropiate credit
- Fontspace: Huge font repository
- Gif Optimizer: Includes lots of options even for animated gifs
- Google Fonts: An increasing collection of free web and downloadable fonts
- Imagemagick cheatsheet: Small personal cheatsheet of common operations with IM
- Paletton: Choose a color and get 3 related ones (darker and brighter)
- Paint.net: Freeware Windows alternative to Photoshop. For linux, I use Pinta
- Pixelation
- PixelJoint
- ScreenResolution.org: Simple yet useful website that shows you your current viewport resolution, very handy for mobile phones.
- Squoosh.app: Online image compressor & optimizer with side-by-side preview
- Simple Icons: SVG icons for popular brands
- The Spriters Resource
- Twitter's Bootstrap: HTML, CSS, & Javascript framework
- UI-patterns.com
- UPNG: Online PNG optimizer
Hardware & IT
- CPU Benchmark List
- PSU Calculator: Easily calculate the amount of watts your new PC will require
- Screen cheatsheet: To have multiple terminals and not loose them if connection goes down
- ServerFault
- SuperUser
- Sysinternals Live
- Uptime.is: Simple uptime and SLA calculator
- Vi cheatsheet
- x64_dbg: Opensource Windows debugger
Miscellaneous
- Choose an open source license
- CURL cheatsheet
- FileFormat.info: Bible of file formats and technical details (headers, etc.)
- List of best slack teams/communities: A lot of tech ones, but also from other topics
- Markdown Syntax
- Random.org: All kinds of random number generators
- Unicode Symbol Map
- UNIX2Std Time calculator
Security
- JavaScript Text Escaping
- OWASP: Software security community
- SQL Injection Cheat Sheet