The following movies and TV shows have mostly-accurate French subtitles, either on the disk or somewhere online. A few have 3rd-party transcripts that aren't synchronized with the dialog.

Your best bets for finding subtitles or transcripts are the following:

Open Subtitles. These can be used with VLC (if you rip the movie to a hard drive) or with subs2srs. Beware tiny subtitle files—some of the movies claiming to have subtitles have only one or two scenes' worth. Hypnoweb. If you look, there are sub-sites for each series, and the lists of episodes will sometimes include scripts.

You can find more movies and series in this HTLAL thread.

Movies Edit

Amélie

French subtitles (often not on the DVD)

English subtitles

Banlieue 13

French subtitles (on at least some US DVDs)

English subtitles

These aren't quite exact, but the first several minutes appear to have only minor omissions, and there's lots of slang.

Bon Cop, Bad Cop

French subtitles

English subtitles

The French subs on the disc are at least 80% accurate. Some of the dialog is in a Quebec dialect, and the subtitles are mostly transcribed in standard French with some Quebec vocabulary.

Chocolat

French subtitles

Fairly clear dialog.

Free Birds

Accurate subtitles on DVD (Region 1, Quebec release)

Hunger Games: L'Embrasement

Accurate subtitles on DVD (Region 1, Quebec release)

Intouchables

Accurate subtitles on DVD (checked Quebec release). Dialog is quite fast and colloquial.

Jeux d'enfants

Transcript

Lock Out

Accurate subtitles on DVD (Region 1, Quebec release)

Ne le dis à personne

French subtitles

Fairly clear dialog.

Red 2

Accurate subtitles on DVD (Region 1, Quebec release)

Need to find links These were mentioned on HTLAL as having good subtitles, presumably on the DVD.

Polisse

Le bonheur des autres

Les Fugitifs

Les Amours Imaginaires

De vrais mensonges

Monsieur Lazhar

Maelstrom

Tomboy

17 Filles

Le silence de Lorna

Tromper le silence

L'auberge Espagnol

Bienvenue Chez Les Chtis

Je Vais Bien Ne t'en fais pas

L'argent de poche

Incendies

Camping

Neuilly sa mère

Je vous trouve très beau

Harry Potter Prisoner of Azkaban (Region 1 release, at least, but not the earlier films)

Harry Potter 1 (at least one French release, 85–95% accurate)

La Femme Nikita (the movie, not the show)

The Hunger Games (French release, 85–95% accurate)

Un Conte de Noël (Canadian edition from EF1 films, but not Criterion edition)

Television series Edit

Big Bang Theory

Mostly accurate. Bref

Has subs.

Buffy contre les vampires

3rd-party transcripts

Box set sometimes available on Amazon.fr

The actual on-disk subtitles are wildly different from the audio, but the transcripts are accurate and the dubbing is very good.

Camera Cafe

Believed to have subtitles. Transcripts are available somewhere online.

Charmed

transcripts for season 1-6: http://charmed.fantasy.free.fr/charmedfantasy.html

Chuck (Region 2 French dub)

Has fairly accurate subs, at least for seasons 1 and 2.

C.A. Conseil d'Administration

Québécois dialect, very slangy, good subs. Uses several made-up euphemisms for sexual terms.

Kaamelott

Has subs.

Sherlock

Very accurate.

Simpsons (Region 2 French dub)

Transcripts

Les Revenants

Accurate French subs, according to [the discussion here].

more transcripts to french dubs here

https://www.hypnoweb.net/