I like a sentry robot equipped with sensors that can identify human intruders, record audio and video. Knows the address of its assigned area and can notify its owner or authorities, with wifi capabilities.
By Ikeman
Other robots from Synthiam community

Mastersailor's Noisy Boi (Trademark Pending)
Sub 10 foot remote network robot Speed 47 mph Plow Flamethrower Remote start 1000s of devices Security, email push Has...

Herg62123's Omnibot 5402 Project - Code Name: Minion 8
I have had my OmniBot in his box sitting in the garage for the past 30 years because I could not find a battery for him....

Justinratliff's Ez-Face
EZ-Face is the first in what I plan to develop into a suite of supporting application for ARC and other robotics...