Heytools - JavaScript tools, AJAX tools and some fully server side tools.
Change Case - Multiple methods to change text case.
WordCounter.net - Count words, sentences, paragraphs etc.
TitleCase - Convert text to Title Case, UPPERCASE, lowercase, CamelCase, Pascal Case, Start Case, snake_case, hyphen-case, ...
TextBuddy for macOS - A Swiss Army knife for plain text.
Word Count Tools - The must-have free word counter that provides an extensive report about the word count, character count, keyword density, readability & many other useful stats.