Simple type "/contacts" to share contacts from your phone, "/gifs" to send a (you guessed it) GIF, and more. Really cool concept, especially when switching apps to find and share these things on the iPhone is inefficient.
Side note: Custom keyboards, introduced in iOS 8, are like mini apps that can be used inside of other apps. This opens up several possibilities but Apple's execution is a bit disappointing. It's cumbersome to switch keyboards, especially if you have 3 or more installed.
Product Hunt