Google Slides
Google Slides is the newest of the three original document editing apps. After an acquisition earlier that year, it was launched as Google Presentations in September of 2007  Slides was renamed and joined the Google Drive umbrella in June 2012.
Like Docs and Sheets, Slides features document collaboration and sharing with a number of other users. It also full offline editing, slide effects, and final projects can be downloaded in a number of formats. Users can also present their presentations from the web. Companion Android and iOS apps allow users to edit while on the go.