Dead Simple Screen Sharing - Simple screen sharing and audio conferencing software.
Airfoil - This software is from the Rogue Amoeba company, built to run on Mac and Windows platforms. It’s an audio-based software that allows the computers sound to play over a network device. Read more about Airfoil.
Demodesk - Collaborative screen sharing for sales & success teams
AudioRelay - Listen to your PC audio, use your phone as a mic or stream audio from your phone
Witeboard - A real-time whiteboard for your team. No signups required.
SoundWire - SoundWire does audio mirroring (audio cast). You can use any music player on your PC or laptop like Spotify, YouTube, or iTunes and stream low-latency live sound over WiFi directly to your Android device.