I have a handful of WiFi cameras and can recommend two based on my experience, with a caveat: * Lower-end D-Link Cameras. Look for screenshots of the web inte

I have a handful of WiFi cameras and can recommend two based on my experience, with a caveat: * Lower-end D-Link Cameras. Look for screenshots of the web interface on the camera in the manual. * Amcrest The caveat is that both companies offer a cloud service and their cameras really like to try to phone home. The upside is that if you put them on a network that's unable to connect to the internet they still function normally. Depending on what you want, there are a couple of options. All of these assume that you do not want to use the cloud service and do not want the cameras to phone home, this is enforced by your firewall/router. 1) Easiest is to give the cameras access to your ISP's mail server and use the camera's onboard motion detection/email features to send you alerts. 2) Another easy option is to give the cameras access to an FTP server and have them send any files there when they detect motion. 3) You can go all out and deploy Zoneminder, Blue Iris, iSpy, or a similar product on your network. Personally, I use Zoneminder, but by all accounts the other products listed work well. QNAP and Synology NAS devices also include camera monitoring software, but I haven't done any serious investigation into either. All three of these approaches can be mixed and matched, but once you have more than a couple of cameras it's really nice to have everything centralized. Option 3 is definitely the most effort. The key thing is to read the manual and reviews before you buy and make sure that the camera will work in the manner you want.