Titles on IGDB that are decidedly not games. If you think any of these might actually be games, please let me know.
This definitely isn't me developing an elaborate case for when IGDB inevitably removes the multimedia CD-ROM stuff I plan to add.

If you can believe it, there are many non-game titles not on IGDB yet that are on other databases, listed below:

My Virtual Tutor: Reading First Grade to Second Grade [Nintendo DS]
My Virtual Tutor: Reading Kindergarten to First Grade [Nintendo DS]
My Virtual Tutor: Reading Pre-K to Kindergarten [Nintendo DS]
Driving Theory Training [Nintendo DS]
Shinri Kenkyuuka Yuuki Yuu Kanshuu: Mainichi Kokorobics DS Therapy [Nintendo DS]
Gardening Guide [Nintendo DS]
NextRev: Shakai Fukushishi Shiken [PS Vita]
Number Magic [TI-99]
Energy Czar [Atari 800]
SCRAM [Atari 800]
Countries of the World [ZX Spectrum]
Art Master [Vectrex]
Story Maker [Apple II]
Dave Winfield's Battery Up! [Commodore 64/Apple II]
I Am A Teacher: Teami no Kiso [Famicom Disk System]
Speller Bee [Amiga/Mac/Apple IIgs/Atari ST]
Artist Tool [PC-Engine]
The Miracle Piano Teaching System [NES/SNES/Genesis/Amiga]
ArtRageous! [Mac/PC]
Res Arcana Diana Rei: Uranai no Meikyu [SNES]
Ultraman - Hiragana Dai Sakusen [Playdia]
Passport to Paris [PSP]
Passport to Prague [PSP]
Passport to Rome [PSP]
Passport to London [PSP]
Passport to Amsterdam [PSP]
Passport to Barcelona [PSP]
Talkman Travel [PSP]
Kanji Sono Mama Rakubiki Jiten [Nintendo DS]
Otona no Joushikiryoku Training DS [Nintendo DS]
The Holy Bible [Game Boy Advance]
Kanji Trainer Portable [PSP]
Nova Usagi no Game de Ryuugaku!? DS [Nintendo DS]
Traxxpad: Portable Studio [PSP]
Moetan DS [Nintendo DS]
Moe Star: Moeru Toudai Eigojuku [Nintendo DS]
250 Mannin no Kanken: Wii de Tokoton Kanji Nou [Wii]
My SAT Coach [Nintendo DS]
Shiseido Beauty Solution Kaihatsu Center Kanshuu: Project Beauty [Nintendo DS]
Sekai no Gohan Shaberu! DS Oryouri Navi [Nintendo DS]
Winter's Tail: How One Little Dolphin Learned to Swim Again [Nintendo DS]
Anpanman to Asobu: AIEUO Kyoushitsu DX [Nintendo DS]
Mommy Talk DS [Nintendo DS]
Bikkuriman Kanjuku Haou Sanmi Douran Sensouki [Nintendo 3DS]
TOEIC Test: Jissen Tokkun [PS Vita]
NextRev: Eibunpou Tettei Tokkun [PS Vita]
NextRev: Gyouseishoshi Shiken [PS Vita]
NextRev: Kihonjouhou Gijutsusha Shiken [PS Vita]
NextRev: Ouyou Jouhougijutsusha Shiken [PS Vita]
NextRev: IT Passport Shiken [PS Vita]
NextRev: FP Ginoukentei Shiken 2-Kyuu [PS Vita]
NextRev: FP Ginoukentei Shiken 3-Kyuu
Petit Computer [DSiWare]
Dora Eigo: Nobita to Yousei no Fushigi Collection [Nintendo 3DS]
Dora Moji: Nobita no Kanji Daisakusen [Nintendo 3DS]
Ugoku Manga Digicoro [Series, Nintendo 3DS]
Koueki Zaidan Houjin Nippon Kanji Nouryoku Kentei Kyoukai Kanken Training 2 [Nintendo 3DS]
Maru Goukaku! Tatsu Kenshi Shiken Heisei 29 Nendoban [Nintendo 3DS]
Manga Kakeru [PS Vita/PS4]
PDI Check [Nintendo 3DS]
EZ Message Sender [Xbox 360]
Kuruma de DS [Nintendo DS]
Card Creator X-Mas [Xbox 360]
Hana to Ikimono Rittai Zukan [Nintendo DS]
Wiki Read: Wikipedia for Xbox [Xbox 360]
Happy Holidays: Halloween [Wii]
Happy Holidays Christmas [Wii]
myNotebook: Tan [Nintendo DSi]
myNotebook: Carbon [Nintendo DSi]
myNotebook: Pearl [Nintendo DSi]
myNotebook: Blue [Nintendo DSi]
myNotebook: Green [Nintendo DSi]
Otona no Renai Shousetsu DS: Harlequin Selection [Nintendo DS]
Bible Navigator X: HCSB [Xbox 360]
Audio Diagnostics [Xbox 360]
Minna no Navi [PSP]
Minna no Chizu 2 [PSP]
Minna no Chizu [PSP]
Maplus: Portable Navi 3 [PSP]
Maplus: Portable Navi 2 [PSP]
Maplus: Portable Navi [PSP]
GameFinder [Xbox 360]
Ultra-Powered Massager! [Xbox 360]
World Clock [Xbox 360]
Suguroku DS [Nintendo DS]
Nagameru Dake de Kashikoku nareru! Mojipittan Shiritori Tokei [Nintendo DSi]
DS Uranai Seikatsu [Nintendo DS]
DS de Yomu Series: Tezuka Osamu Hi no Tori 1 [Nintendo DS]
DS de Yomu Series: Tezuka Osamu Hi no Tori 2 [Nintendo DS]
DS de Yomu Series: Tezuka Osamu Hi no Tori 3 [Nintendo DS]
Sunrise Anime Duke - Sunrise no Joushiki: Minna no Hijoushiki Vol. 1 [Nintendo DS]
Sakashou DS [Nintendo DS]
The Holy Bible [Game Boy Advance]
Relax [Atari 8-bit]
Jaguar Mishin Sashi Senyou Soft: Mario Family [Game Boy Color]
Dejiko no Maibura [Dreamcast]
Mary-Kate and Ashley Pocket Planner [Game Boy Color]
Idol Janshi Suchie-Pai Secret Album [Saturn]
Aquazone Option Disc Series 1 Angel Fish [Saturn]
Aquazone Option Disc Series 2 Black Molly [Saturn]
Aquazone Option Disc Series 3 Blue Emperor [Saturn]
Aquazone Option Disc Series 4 Clown Loach [Saturn]
Aquazone Option Disc Series 5 False Rummy-Nose [Saturn]
Ayrton Senna Personal Talk: Message for the future [Saturn]
Cubic Gallery [Saturn]
Daina Airan: Yokoku Hen [Saturn]
DiscStation Bessatsu i miss you. [Saturn]
Pict Flash Dondon [Saturn]
Eyeful Home [Saturn]
Habitat II [Saturn]
Heim Waltz [Saturn]
Mogitate Sega Saturn Vol 1 [Saturn]
Mogitate Sega Saturn Vol 2 [Saturn]
Mogitate Sega Saturn Vol 3 [Saturn]
Mogitate Sega Saturn Vol 4 [Saturn]
Mogitate Sega Saturn Vol 5 [Saturn]
Mogitate Sega Saturn Vol 6 [Saturn]
NetLink Custom Web Browser [Saturn]
Pad Nifty [Saturn]
Photo CD Operating System [Saturn]
Saturn CG Selection [Saturn]
Sega Saturn Denshi Book Operator [Saturn]
Sega Saturn Internet Vol. 1 [Saturn
Sega Saturn Internet 2 [Saturn]
Special Disc with Sega Saturn Internet 2 [Saturn]
Segakore Sega Bible Mogitate Sega Saturn [Saturn]
Virtua Navi V. 2.00 [Saturn]
Ginga Ojousama Densetsu Yuna Mika Akitaka Illust Works [Saturn]
Ginga Ojousama Densetsu Yuna Mika Akitaka Illust Works 2 [Saturn]
Legend of K-1 Grand Prix '96 [Saturn]
Legend of K-1 The Best Collection [Saturn]
Lupin the 3rd: Chronicles [Saturn]
Lulu: Un Conte Interactif de Romain Victor-Pujebet [Saturn]
Media ROMancer Daisuke Asakura [Saturn]
The Making of Nightruth [Saturn]
Making of Nightruth II: Voice Selection [Saturn]
Nightruth Voice Selection: Radio Drama Hen [Saturn]
Okudera Yasuhiko no Sekai o Mezase! Soccer Kids: Nyuumon Hen [Saturn]
Playboy Karaoke Collection Volume 1 [Saturn]
Playboy Karaoke Collection Volume 2 [Saturn]
Sakura Taisen Hanagumi Tsuushin [Saturn]
Sakura Taisen Jouki Radio Show [Saturn]
Halnote [MSX]
Color Bar Generator [Atari 2600]
Story Machine [C64/Atari 800]
Sento Monogatari Sono I [PSX/Saturn]
Shichu Suimei Pitagraph [PSX/Saturn]
Sotsugyou Album [Saturn]
Sound Novel Tsukuru 2 [Saturn]
Tenchi Muyou! Ryououki Gokuraku CD-ROM for Sega Saturn [Saturn]
Ultraman Zukan [Saturn]
Ultraman Zukan 2 [Saturn]
Ultraman Zukan 3 [Saturn]