Meta Tags
Dot Matrix, Free Meta Tag Builder - ScrubTheWeb, Free Meta Tag Generator - Free Webmaster Tools, Free Metatags Generator - RetailUnion, Generate Meta Tags - Lazworld Inc., Language Museum, Meta Tag Builder - Vancouver Webpages, Meta Tag Generator, Meta Tag Generator - 321 Webmaster, Meta Tag Generator - AnyBrowser
Validators and Lints
Alpine HTML Doctor, Doctor HTML, Dr. Watson, HTML and XHTML Syntax Checker, HTML Code Cleaner, HTML Code Cleanup, HTML Tidy Download, HTML Tidy Online, HTML/XHTML/XML validator, Markup.co.nz
Font Control Code - Face and Size Customizer
Copy and paste code for preview of sixteen fonts faces and four font sizes.
HTML Color Chart & Codes
Tests different colour combinations on a webpage.
HTML Test Bed
Simple tester with basic codes filled in. Includes email save feature.
SiteReportCard
Checks for meta tags, broken links, misspelled words, load time, keywords, and link popularity. HTML validation and search engine inclusion also available.
Website Wizard
"WYSIWYG" web-based tool to help generate HTML code. Not compatible with all browsers.