WordCounter.net - Count words, sentences, paragraphs etc.

KeywordDensityAnalyzer.com - Website Keyword Density Analyzer Tool

Heytools - JavaScript tools, AJAX tools and some fully server side tools.

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.

Treo - Treo is the page speed monitoring tool that helps your customers from obtaining a faster web experience.

NimbleText - NimbleText is a text manipulation and code generation tool available online or as a free download.