AirParrot - AirParrot is an interesting piece of software that allows you to view content from your Mac desktop through your television set if you have an Apple TV that can act as a bridge between the two devices. Read more about AirParrot.
Duet Display - With Duet Display, you can transform your iPhone or iPad into a second display to expand the screen space of your PC or Mac system.
AirPlay - AirPlay lets you stream music throughout your entire house — wirelessly.
Luna Display - Hardware that turns the iPad into a wireless second display
1001 TVs - 1001TVs | Screen Mirroring Expert, Android Phone, iOS Phone, Windows, Mac, Android TV, Apple TV, and other smart TV support. Ideal for live streaming.
iDisplay - iDisplay is an app that turns a mobile device into a secondary desktop monitor. The app currently supports iOS, Android, Windows and MacOS, and it lets users connect a desktop computer to a mobile device over WiFi. Read more about iDisplay.