Easily monitored areas by using webcams and microphones.
ISpy you monitor your premises and get alerted when burglars.
The open source software is very extensive and offers above all constant topicality, frequent updates make this product better every day.
iSpy served are the images of your webcam or infrared camera. If the program registers a movement, an alarm sounds. Optionally, it is also possible to start recording images / clips.
The material cut with can be - stored then either so locally, or by using an FTP account also externally on the computer, if the uninvited guest just takes the hardware and could destroy so the evidence.
Who wants to be there live, can bankroll an additional featur enable: the live stream directly to your Smartphone.
The free version includes all functions. You pay extra for a live stream on the Smartphone.