HTML_QuickForm2 : This PHP package provides methods to create, validate and render HTML forms.
HTML Purifier : HTML Purifier is a standards-compliant HTML filter library written in PHP. HTML Purifier will not only remove all malicious code (better known as XSS)...
Cliquet : Cliquet is a toolkit to ease the implementation of HTTP microservices, such as data-driven REST APIs.
Polymer : Web Components usher in a new era of web development based on encapsulated and interoperable custom elements that extend HTML itself. Built atop these...
Photon : UI toolkit for building desktop apps with Electron.
In few words, Given a html document, it pulls out the main body text and cleans it up. It also can clean up title based on latest readability.js code.