Density - A modern infrastructure for anonymously counting people
motionEyeOS - A Video Surveillance OS For Single-board Computers
Nest Cam - A new security camera by Nest
AI Cam - Mobile webcam software with artificial intelligence (ai). Video surveillance via the Internet with automatic event recognition
Canary Flex - Versatile indoor/outdoor security device
Unifi Video - Unifi Video by Ubiquity is designed specifically around Ubiquiti range of cameras and is free.