'Textbuddy' is an excellent tool. It has a simple UI layout. The tool is very powerful to improve and expand written text. Some key features that I like are:
a. Click on any word in the textbox and synonyms are shown automatically. When moving the cursor to next word, then immediately synonyms are shown for the new word.
b. The option to 'Add relevant content' is really powerful. The output is excellent and helps to expand written text.

Thank you for developing 'Textbuddy'.