SlidesPPT - Beautiful free presentation templates for Google Slides
Teleprompt.me - The only web-based voice controlled teleprompter!
Slidebean - Presentations that design themselves
Words to Time - Calculates how long a talk will take to read.
Selfone - Free template for PowerPoint, Keynote and Google Slides
Video Teleprompter - A teleprompter app for iPhone/iPad, with built in camera