Code Front

< Use >

Brackets text editor (the best one I know !)

Can I use

Code Beautify: JavaScript Validator

CodePen

Font Library (Free Fonts)

JS Bin

Neocities.org: Create your own free website

Plunker (an online code editor)

Validator.nu: (X)HTML5 Validator

VirusTotal: a free service that analyzes suspicious files and URLs

W3C » CSS Validator

W3C » HTML5 (i.e. Markup) Validator

W3C » Link Checker

WebsitePro (an online website builder)

Wufoo. A form builder !