Thumbtacks and Colored Strings

The accessories for tracking conspiracies and Love Dodecahedrons, especially before the computer era. One pins the photos to a board and then connects them with colour-coded strings. Often a part of a Room Full of Crazy, but can just as easily be seen in non-crazy use by a team of detectives or intelligence agents trying to piece together a complex case.

Film

 * In Sherlock: Game of Shadows, the detective has a huge chart in his apartment, just to keep track of the connections of all the crimes.

Literature

 * Control by Victor Suvorov had it as a plot point. The protagonist set up such a board as her first project at the new job, to track the relationships between various bosses in Party, NKVD, etc and spot possible dangerous cabals. Her first conclusion was that this requires much larger cork panels.

Live-Action TV

 * Teen Wolf had a "crime board" set up by Stiles. The starting state of all strings is "unsolved".

Video Games

 * Appears in one of the endings of the rather bizarre Simulation Game Air Marty, when Marty is not the winner of the Gameshow within a game Casual Encounter and ends up stalking the woman who chose another contestant over him.

Web Comics

 * Questionable Content, when Faye [//questionablecontent.net/view.php?comic=1089 tried to explain] relations within her circle of friends to a psychologist, the need arose.
 * xkcd meta-humour [//xkcd.com/2244/ presents] the "Attract Mode" for this game.
 * [//ruoyuart.tumblr.com/post/186637133437/when-the-commissar-knows-but-cant-prove-it-was When the Commissar knows but can’t prove it was you…], a Warhammer 40,000 one-shot from Chen Ruo Yu where a Commissar tries to connect the incident reports and find whatever heresy there may be.

Western Animation

 * In Justice League Unlimited, The Question's room in the Watchtower has one of these where he charts and threaded global warming, military upheavals in third world countries, actors elected to public office, the spread of coffee bars, germs outpacing antibiotics, and boy bands. He believes all of these separate events and activities connect to an ancient conspiracy dating back to Egyptian times.
 * In season 2 of Carmen Sandiego, Chase Devineaux has a thread chart to try and track down Carmen Sandiego off the grid contrary to his desk job at Interpol.