Here is a tiny camera that helps you keep an eye on your property day and night. The TP-Link HD Day/Night Cloud Camera offers 720p HD video and night vision. The tpCamera app lets you access feeds from anywhere. Motion / sound detection is also available, so you receive e-mail notifications when unexpected activity is detected.
The NC250 can monitor up to 18 feet away in total darkness. It can also serve as a WiFi extender. More information is available here.