NimbleText - NimbleText is a text manipulation and code generation tool available online or as a free download.
ML5.js - Friendly machine learning for the web
WordCounter.net - Count words, sentences, paragraphs etc.
ML Image Classifier - Quickly train custom machine learning models in your browser
Heytools - JavaScript tools, AJAX tools and some fully server side tools.
Machine Learning Playground - Breathtaking visuals for learning ML techniques.