CodeSandbox: Online Code Editor Tailored for Web Application Development
Utilidades
myCompiler - An online IDE for C, C++, Java, Python, Go, NodeJS and other languages
StackEdit
StdLib Code.xyz — Code Editor for APIs
Extensionizr
WhatRuns — Discover What Runs a Website
Accented Characters and Ligatures in HTML and JavaScript
List of XML and HTML character entity references - Wikipedia
Special and Math Symbols in HTML and JavaScript
The complete table of ASCII characters, codes, symbols and signs, American Standard Code for Information Interchange, The complete ASCII table, characters,letters, vowels with accents, consonants, signs, symbols, numbers ascii, ascii art, ascii table, cod
HTML Entities
Base64 Encode and Decode - Online
Base64 Guru
Base64 Image Encoder
Encode and decode a piece of text to its HTML equivalent - HTML Entities Encoder / Decoder | Web 2.0 Generators
Unicode Text Converter
{{ mustache }} - Logic-less tag templates
10015 Tools | All Online Tools in One Box
Digital Coding - Free Software Downloads and Computer Programming Resources
FileInfo - The File Extensions Database
Free Meta Tag Generator
Free Online GUID Generator
FreeFormatter.com - Free Online Tools For Developers
Frontend Toolkit - Utilities for your recurring Frontend tasks
Meta Tags — Preview, Edit and Generate
Tables Generator
TinEye Reverse Image Search (verificar situação comercial da imagem)
Web Toolkit Online - Free web online tools