40+ years since The Exorcist and The French Connection, William Friedkin is still making movies. The following are some of his movies since...
The Brink's Job (1978) - A true comedy robbery - was Oscar nominated for Set/Art direction and has great lines with some slapstick. It is more like reverse of the "chain of events going unplanned". It snowballs to your favor.
Cruising (1980) - Al Pacino as a gay undercover cop in 80's remains more of a cult status now. The movie was based on a novel and has a good ending . It was voted for worst movie/director and would have made some profit if it was remade appropriately now.
Jailbreakers (1994) - had good structure with interesting characters. Tony is hot tempered & madly in love with Angel - He goes the distance and lands up in prison, Angel is a jailbird herself contained in a wealthy family.
http://www.imdb.com/rg/s/1/video/screenplay/vi4123305497/
Jade (1995) was based on thriller by Joe Eszterhas(writer for Basic Instinct, Show girls) but Friedkin changed it completely. It was not innovative.
The Hunted (2003) has Tommy lee and Del Toro, the hunter-hunted psychological chase starts very interestingly & the hunt drags a bit near climax but ends very well.
The Bug (2006) - The movie starts well as the characters are revealed and like AshJudd we start to believe what the paranoid drifter says. By mid-movie we don't believe "whatever he says" like she does - that's where the bugbite seems trivial.
Killer Joe(2011) - Bug screenwriter wrote the story and the style/mood/acting/music all gel-up nice - like a Tarantino flick. We don't question 'reality' here till he we realize some common-sense would have helped.
I haven't got a chance to look into his other works yet. I am sure it will re-surface again.