I tried to link where you can find these things, but sometimes they're out of stock or out of print.  Special thanks to JapaneseGIRL for providing several links to the items.

Games

Gyakuten Saiban - GBA

Released: October 12, 2001

The original GBA game that began the series.  Available at e-capcom for ¥3,129.

Second game in the series, featuring Prosecutor Karuma Mei

Gyakuten Saiban 3 - GBA

Released: January 21, 2004

Third game in the GS series, featuring Prosecutor Godot.  Available at play-asia.com for $34.90.

Gyakuten Saiban - PC

Released:  December 23, 2005

Remake of the original GS1, without any of the extras from the NDS remake.  It runs on Windows XP/2000 (I think only if your system is Japanese, though).

Available at Sourcenext for ¥2,970. 

Gyakuten Saiban 2 - PC

Released: March 31, 2006

Remake of the original GS2, as is just like the GBA version.  It runs on Windows XP/2000 (I think only if your system is Japanese, though).

Available at Sourcenext for ¥2,970. 

Gyakuten Saiban 3 - PC

Released: March 31, 2006

Remake of the original GS2, as is just like the GBA version.  It runs on Windows XP/2000 (I think only if your system is Japanese, though).

Available at Sourcenext for ¥2,970.

Gyakuten Saiban: Yomigaeru Gyakuten - NDS

Released: September 12, 2005

This game is a remake of GS1, featuring the original 4 cases, plus an extra fifth case with DS-only features.

Available at play-asia.com for $29.90, or e-capcom for ¥3,129.

Gyakuten Saiban: Yomigaeru Gyakuten Limited Edition - NDS

Released: September 12, 2005

This limited edition release of the NDS remake in Japan contained the Turnabout Crossover Manga, an "Objection!" DS strap, and the Finger Pointing Stylus (pictured below).  It is by now out of print.

Phoenix Wright: Ace Attorney - NDS

Released:  October 12, 2006

The America remake version of GS:YG.

Available at online stores all over the place.

Phoenix Wright: Ace Attorney (European Release) - NDS

Released: March 31, 2006

The European release of Phoenix Wright.  Features different box art and a French language option.  A different European version features Italian, Spanish, and German language.

Gyakuten Saiban 2 - NDS

Released: October 26, 2006.

Remake of GS2 for GBA.  Features no new cases, but a few DS features and dual language option (Japanese and English)

Available at play-asia.com and other import stores.

Phoenix Wright Ace Attorney: Justice For All - NDS

Released: January 16th, 2007.

Remake of GS2 for NDS, translated to English.  Said to feature no new cases, but a few DS features.

Preorders received the PW Stylus with their orders.  Available at game stores everywhere.

Phoenix Wright Ace Attorney: Justice For All (European Release) - NDS

Released: March 16th, 2007.

The European release of Justice For All, with English and French language options.

Gyakuten Saiban 4 - NDS

Release: April 12, 2007

First game of the new protagonist, Housuke Odoroki.  Features new gameplay elements and DS-centric features.  Japanese Language only.

Gyakuten Saiban 4 Limited Edition- NDS

Release: April 12, 2007

Features extra goods such as the Gyakuten Saiban Dictionary, a DVD of GS promotional movies and trailers, and for pre-orders a set of Odoroki headphones.  Only place you can really find them now is Ebay.

Release: August 23rd, 2007.

Remake of GS3 for GBA.  Features no new cases, but a few DS features and dual language option (Japanese and English)

Available at Play-asia.com and other import stores.

Phoenix Wright Ace Attorney: Trials and Tribulations - NDS

Released: October 23rd, 2007.

Remake of GS3 for NDS, translated to English.

Available for preorder at Gamestop and other gaming stores.

Phoenix Wright Ace Attorney: Trials and Tribulations (European Release) - NDS

Released: Some time in 2008

Remake of GS3 for NDS, translated to English (and presumably French)

Apollo Justice Ace Attorney - NDS

Released: "Early" 2008.

English translation version of GS4.

Apollo Justice Ace Attorney (European Release) - NDS

Released: Sometime in 2008.

European version of GS4.

Manuals and Fanbooks

Gyakuten Saiban Manual

Released:  November, 2001
Pages:  63
Contents:  I'm not honestly sure what's in this one, I don't know anyone who has it!  Probably just a game walkthrough.

Available at amazon.co.jp for ¥1,050

Gyakuten Saiban 2 Manual

Released:  December, 2002
Pages:  143
Contents:  Half strategy guide, half concept sketches of the characters.  Includes director and designer thoughts on the GS2 characters.

Available at amazon.co.jp for ¥1,260

Gyakuten Saiban 3 Manual

Released:  March 2004
Pages:  239
Contents:  Half strategy guide, half concept sketches, like the GS2 manual.

Available at amazon.co.jp for ¥1,365

Gyakuten Saiban: Yomigaeru Gyakuten Manual

Released:  November, 2005
Pages:  191
Contents:  Half strategy guide, half concept sketches, like the others.  Also contains Suekane's four full spread case manga.

Available at amazon.co.jp for ¥1,365.

Gyakuten Saiban 2 Official Complete Guide (NDS)

Released:  October 26, 2006
Pages:  112
Contents:  Most likely similar to the above mentioned guide.  If you have this book,

 please let me know what's in it.

Available at amazon.co.jp for ¥1,050

Gyakuten Saiban Postcard Book

Released:  September, 2005
Pages:  36 postcards
Contents:  Postcards from all three games. 

Available at amazon.co.jp for ¥900, and e-capcom.

Gyakuten Saiban Fanbook

Released:  August, 2005 (by MediaWorks)
Pages:  111 pages
Contents:  Character bios, sketches, and some misc art.

Available at amazon.co.jp for ¥4,300

Naruhodo Gyakuten Saiban

Released:  June 1, 2006
Pages:  144
Contents:  Various official art, a record of the various director chats available on the Capcom websites, and a lot of chat between the GS characters.  You can find most of the art at Exhibit A but it's still a great book.

Available at amazon.co.jp for ¥1,575.

Gyakuten Saiban Official Fanbook

Released:  June 30, 2006
Pages:  95
Contents:  Chat about the characters in the series (emphasis on GS:YG and GS2), background art, guest art, a few fun extras and some 4-panel comics at the back.  Not necessarily useful for a non-Japanese speaker, as it's mostly shallow descriptions and most of the art isn't "official".  Includes a "Best Of Soundtrack" with a few tracks from the series, but they haven't been remixed or anything.

Available at  amazon.co.jp for ¥1,600.

Gyakuten Saiban Official Fanbook 2

Released:  October 26, 2006
Pages:  112
Contents:  Similar to fanbook one, with background art, guest art, 4koma, and a mini-manga about Edgeworth's crazy dream sequence in a tea shop.

Available at amazon.co.jp for ¥1,365.

Gyakuten Saiban Official Fanbook 3

Released:  April 12, 2007
Pages:  65
Contents:  Similar to fanbook one, with background art, guest art, 4koma, and another mini-manga.

Out of print

Gyakuten Saiban 3 Official Complete Guide (NDS)

Released:  August, 2007.
Contents:  Most likely similar to the above mentioned guides.  If you have this book, please let me know what's in it.

Available at play-asia.com for $9.90.

Gyakuten Saiban 4 Official Complete Guide (NDS)

Released:  June 16th, 2007.
Pages: 255
Contents:  A play guide and character art/concept sketches.

Out of print.

The Art of Gyakuten Saiban.

Release: September 26, 2007.
Pages: 160 and 80 pages.
Contents: Art (most likely)

Available for preorder at Play-Asia for $39.90.

Doujinshi Anthologies

Gyakuten Saiban Official Anthology Comic (Naruhodou Version)

Released:  March 28, 2006
Pages:  144
Contents:  A collection of fan-created manga officially published by Capcom.

Available at amazon.co.jp for ¥900, or from e-capcom.

Gyakuten Saiban Official Anthology Comic (Mitsurugi Version)

Released:  March 28, 2006
Pages:  144
Contents:  Another collection of fan-created manga officially published by Capcom.

Available at amazon.co.jp for ¥900, or e-capcom.

Gyakuten Saiban Anthology 4 Koma Kingdom I & II

Released:  August, 2003.
Pages:  ??
Contents:  Another collection of fan-created manga officially published by Capcom.

Available at amazon.co.jp for ¥860, or Futabasha for ¥800.

Gyakuten Saiban 3  4 Koma Kingdom

Released:  March, 2004.
Pages:  ??
Contents:  Another collection of fan-created manga officially published by Capcom.

Available at amazon.co.jp for ¥800, or Futabasha for the same.

Gyakuten Saiban Anthology Kingdom

Released: August 12, 2003

Pages: ??

Contents:  More fan comics, published by Futabasha.

Available at Futabasha for ¥860.

Gyakuten Saiban Comic Anthology

Released: ??
Pages: ??

Contents:  More fan comics, published by Ichijinsha.

Listed at Ichijinsha but it's out of print now.

Gyakuten Saiban Official Anthology Comic - Naruhodou Version (2)

Released: October 6, 2006.

Pages: 144.
Contents:  More fan comics.

Gyakuten Saiban Official Anthology Comic - Mitsurugi Version (2)

Released:  October 6, 2006.

Pages: 128.
Contents:  More fan comics.

Gyakuten Saiban 4 Official Anthology Comic

Released:  August 1st, 2007
Pages:  ??
Contents:  A collection of fan-created manga officially published by Capcom.

Official Goods
(as listed in the official fanbook)

Stylus and Objection Screen Cleaner / DS Strap

Released with the Limited Edition Gyakuten Saiban: Yomigaeru set, and also with pre-orders of Phoenix Wright: Ace Attorney / Justice For All.

Gyakuten Saiban Bust Figures

Released: May 19, 2006

Out of print.

Gyakuten Saiban Business Card Holder

Released: September 2005.

Godot's Coffee Mug

Released: 2004.

No longer available.

Shitajiki

Released: 2004

Pin Sets

These pins were released in three different sets.

Out of print.

More GS Pins

A set of 5 pins.  Out of print.

Naruhodou and Mitsurugi Notepads

Released: 2004.

Out of print

Naruhodou Mini Doll

Comes in a set of six other Capcom character dolls.  Also the pre-order gift with English preorders of PW: T&T.

Blue Badger and Larry Shirts

Released: 2004.

No longer available.

GS4 Shirt

This GS4 shirt featuring Odoroki's silhouette was available at Capcom's booth at the Tokyo Game Show, 2006.

Available now at e-capcom for ¥3,045

Gyakuten Saiban 4 Calendar

Released:  March 12, 2007

Available at Capcom's e-store for ¥1,260.00.

Gyakuten Saiban 4 Bracelets

Released:  Late September 2007

Available at Capcom's e-store for ¥525

Gyakuten Saiban 4 Odoroki Notepad

Released:  Late September 2007

Available at Capcom's e-store for ¥368

Gyakuten Saiban 4 Kyouya Notepad

Released:  Late September 2007

Available at Capcom's e-store for ¥368

Gyakuten Saiban 4 Pencil Board

Released:  Late September 2007

Available at Capcom's e-store for ¥236

Gyakuten Saiban 4 Clearfile

Released:  Late September 2007

Available at Capcom's e-store for ¥368

Odoroki Cell Phone Strap

Released: Early November, 2007

Available at Capcom's e-store for ¥893.

Psyche-Lock / Magatama Cell Phone Strap

Released: Early November 2007

Available at Capcom's e-store for ¥893.

Garyuu Wave Pendant

Released: Early November, 2007

Available at Capcom's e-store for ¥1,575.

Takita's "Bad Badger" Shirt
Guaranteed to make you more of a man.

Released: Early November, 2007

Available at Capcom's e-store for ¥2,625.

"CD Style" Postcard Set

Released: October, 2007

Available at Capcom's e-store for ¥735.

Gyakuten Saiban Card Case

Released: Tokyo Game Show 2007

Available at Capcom's e-store for ¥6,090.

Gyakuten Saiban Playing Cards
Featuring character art.

Released: Tokyo Game Show 2007

Available at Capcom's e-store for ¥1,554.

Phoenix / Apollo Keyring

Relaesed: Tokyo Game Show 2007

Available at Capcom's e-store for ¥1,260.

Unofficial Goods

These four DS straps are available at play-asia.com for $5.99 each.  Out of print.

"Objection!" and "Hold it!" T-Shirts

Way of the Rodent is selling Unofficial PW shirts for $22 a piece, in various sizes.  The "Hold it" only comes in male sizes, but the "Objection!" shirt comes in male and female sizes.

iObject T-shirt

Aardvark Screenprinting recently added a unofficial PW design to their catalog, featuring Phoenix, iPod style.  Comes in a variety of sizes and colors for $20.  If you enter CourtRecords (case sensitive) to the code box when asked, you can get a discount on your shipping!

Attorney At LOL T-Shirt

This shirt from Ze Stuff comes only in black, sizes ranging from Small to XXXLarge.  Prices go from $16.95 to $19.95.

Cocomonk22 - Various PW shirts including objections, psyche locks, and designs from Ini, Kudo, Cody, the Kitakis, and more!

Atroquinine - Larry Butz shirt

For Soundtracks, please visit the Soundtracks and Voice Clips Page

Information taken from play-asia.com, Exhibit A, and others.

If you know of something I missed, let me know at courtrecord @ gmail.com or catch me on the forum.