W3C Markup Validation Service - Validates HTML markup of web pages, one at a time.
IPFS - IPFS is the permanent web. A new peer-to-peer hypermedia protocol.
HTML Validator - HTML Validator is a Mozilla extension that adds HTML validation inside Firefox and Mozilla.
BitDust - BitDust is distributed secure anonymous on-line storage, where only the owner has access and absolute control over its data.
Rocket Validator - Site-wide Accessibility and HTML validation made easy. With a single click, Rocket Validator will check thousands of web pages on your site for Accessibility and HTML conformance, producing a detailed, actionable report on seconds.
bayard - Bayard is one of the largest religious publishers in North America. Bayard supports the mission of the church to communicate the Gospel message through books, periodicals, and education resources.