Heytools - JavaScript tools, AJAX tools and some fully server side tools.
Froala Editor - Froala Editor is a WYSIWYG HTML editor that enables rich text editing capabilities for the applications.
WordCounter.net - Count words, sentences, paragraphs etc.
Froala Editor V2 - A beautiful modern WYSIWYG HTML text editor
TextBuddy for macOS - A Swiss Army knife for plain text.
CKEditor - Real-time collaborative future-ready rich text editor