Deck
Anki
RemNote
Oogy
Pitch Deck Hunt
On Deck
Decktopus
Tuti
Paste with Frames
Slidebean
Deckset
SlidesPPT
Slides
lagom
Datadeck
WebSlides
DeckAnki - Anki is a program which makes remembering things easy. Because it's a lot more efficient than traditional study methods, you can either greatly decrease your time spent studying, or greatly increase the amount you learn.
Slidebean - Presentations that design themselves
RemNote - All-in-One Tool For Thinking & Learning
Deckset - Turn your notes into beautiful presentations
Oogy - Oogy: Can You Help is an indie deckbuilding adventure.
SlidesPPT - Beautiful free presentation templates for Google Slides