CTOS Trouble in Terrorist Town Addon
This addon adds a buy-able weaponized phone to the TTT gamemode in Garry's Mod, which has it's functionality based upon the hacking system seen in the game 'Watch Dogs' by Ubisoft. This is a unique addon which allows you to interact with both existing and created game entities in interesting ways - it's all about playing with your environment intelligently to get those kills without arising suspicion.
I released this addon for sale a few years back shortly after I created it, on a website named 'coderhire'; it proved very popular among Trouble in Terrorist Town server owners.