&what: Discover Unicode & HTML Character Entities : amp-what is a quick, interactive reference of 14,500 HTML character entities* and common Unicode characters, 8859-1 characters, quotation marks, punct...
AlsacréationS : Alsacréations est une communauté dédiée à l'apprentissage des standards web (W3C, HTML, XHTML, CSS) ainsi qu'à l'accessibilité numérique
Email Standards Project : The Email Standards Project is about working with email client developers and the design community to improve web standards support and accessibility ...
This site provides a collection of schemas that webmasters can use to markup HTML pages in ways recognized by major search providers, and that can also be used for structured data interoperability (e.g. in JSON).
Codelabs management & hosting tools : Codelabs are interactive instructional tutorials, which can be authored in Google Docs using some simple formatting conventions. You can also author c...
SoundManager 2 : Using HTML5 and Flash, SoundManager 2 provides reliable cross-platform audio under a single JavaScript API.
TLDR pages : The TLDR pages are a community effort to simplify the beloved man pages with practical examples.
Flowplayer : Flowplayer is a beautiful and minimalistic, yet full-featured HTML5 video player that lets your video be the star of the show. Supports all devices.