Worqshop is a small development environment for the iPad with GitHub and Heroku support. It features a fast code editor with syntax highlighting for Python, Ruby, HTML, CSS, and JavaScript files.

wysihtml5 is an open source rich text editor based on HTML5 technology and the progressive-enhancement approach. It uses a sophisticated security concept and aims to generate fully valid HTML5 markup by preventing unmaintainable tag soups and inline styles.

オンラインでできる画像編集サービス

WYSIWYG editor for Impress.js