From the Wikipedia list. I think I've removed most of the non-BD titles (The Hard Way hasn't been released yet but if you haven't seen it you should track it down) and I think I've seen most of them. The French Taxi films are great fun, although they aren't strictly 2 police officers.
Quote:
American buddy cop films
16 Blocks (depressed angry cop, and optimistic criminal)
21 Jump Street (geeky cop and cool cop)
48 Hrs. (1982) and Another 48 Hrs. (1990) (sloppy cop with slick convict)
Bad Boys and Bad Boys II (playboy teamed with family man)
Beverly Hills Cop and its sequels (an unorthodox, street-smart cop teams with by-the-book cops)
Big Mommas: Like Father, Like Son (FBI agent teams with his stepson)
Black Rain (American cop teamed with Japanese)
Blue Streak (ex-con impersonating an officer and a newly appointed detective)
Bulletproof (undercover officer teams with a carjacker he befriended)
Chaos
Cop Out (veteran partners who are constantly annoyed by each other)
Cradle 2 the Grave (Taiwanese cop teams up with an African-American jewel thief)
Die Hard series – not strictly in this genre, but includes three films with a similar concept:
Die Hard with a Vengeance (NYC cop John McClane paired with electrician)
Live Free or Die Hard (McClane paired with computer hacker)
A Good Day to Die Hard (McClane paired with cia-agent son)
Double Impact (not cops; twin brothers team up to find their parents' killers in Hong Kong)
Double Team (not cops; counter-terrorism agent paired with an arms dealer)
Fair Game
The Gauntlet (tough alcoholic cop paired with female convict)
The Glimmer Man (L.A. police partners who use different methods)
The Hard Way (an actor teamed with a cop)
Hard Boiled (a cop inspector teamed up with an undercover cop)
Hollywood Homicide (aging veteran L.A. cop paired with younger cop who wants to be an actor)
I Spy (no cops; secret agent teams up with a championship boxer)
Invictus (white and black bodyguards are paired to protect Nelson Mandela)
K-9 (human cop and police dog)
Kiss Kiss Bang Bang (small-time crook paired with gay detective)
Last Action Hero (fictional cop paired with real world boy)
The Last Boy Scout (hardened ex-Secret Service agent turned private detective teams up with disgraced American Football star)
The Lethal Weapon series (by-the-book family man teamed with maverick)
The Man (2005 film)
Marked for Death (ex-D.E.A. agent turned vigilante teamed with his old Army buddy)
Maximum Risk (French cop paired with the girlfriend of his late twin brother)
Men in Black (Tough guy senior agent of a top secret agency recruits young renegade urban cop)
Midnight Run (bounty hunter teamed with well educated accountant)
Miami Vice (2006 film based on the television series)
Money Train (foster brothers/police partners paired with a Latino cop)
The Other Guys (nerdy accountant-type cop teamed with aggressive, case breaking cop)
Point Break (young undercover FBI agent paired with seasoned FBI agent)
Red Heat (Russian cop teamed with American cop)
Replicant (film) (cop paired with the human clone of a killer he's obsessed with catching)
Righteous Kill (vetern police partners pursuing a vigilante they busted years ago)
Rising Sun
The Rookie (stressed out, nervous rookie cop paired with seasoned Veteran cop)
The Rundown (not cops, but a similar idea: a bounty hunter must team up with the target he was originally put in charge of finding)
Running Scared (retiring cops find themselves having to make one final arrest)
Rush Hour
Rush Hour 2
Rush Hour 3
Se7en (educated cop about to retire teamed up with young, eager cop)
Shanghai Noon and Shanghai Knights (no cops; Chinese- American former palace guard teamed up with American outlaw)
Showdown in Little Tokyo (1991) (strong, tough American cop paired with Euroasian cop)
Sherlock Holmes (2009) (two intelligent detectives, one sensible, one slightly eccentric, teamed up)
Shoot to Kill (1988) (black FBI agent teams up with white outdoorsman to catch a killer in the Washington wilderness)
Showtime
Stakeout
Starsky & Hutch (streetwise intuitive cop teamed with reserved, intellectual cop)
Tango & Cash (smooth cop teamed with scruffy cop)
Taxi (2004) – Remake of the 1998 French film of the same title (see "Non-US films" below). Not strictly a buddy cop film, but a similar concept.
Training Day (corrupt narcotics cop paired with idealistic rookie)
Turner & Hooch (cop paired with crime dog)
Wild Wild West (U.S. Army officer teamed with U.S. Marshal)
White Chicks (black FBI agents and brothers disguised as white women)
International buddy cop films
Banlieue 13 (France) – undercover cop and anti-gang activist
The Guard (Ireland) – Irish Garda officer teamed with FBI agent
Hot Fuzz (UK) - Tough, 'By The Book' cop teamed with overweight wannabe action cop
Taxi (1998, France) – not strictly a buddy
Years ago, I read that there was a movie in the works based on the CHiPs TV series from the late 1970s/early 1980s, but I have read nothing about this project since then. I guess that the world is not ready to see Ponch and Jon in action again.