| IYH Launcher | | - | | |
| ImTranslator | | - | | |
| Image GOku Image Viewer | | - | | |
| Image Lookup | | - | | |
| Image Search | | - | | |
| Image Search Options | | - | | |
| Image Search Pro | | - | | |
| Image reverse search | | - | | |
| ImageFolks | | - | | |
| ImageSearch | | - | | |
| Imagus | | - | | |
| ImgFly.eu Free Image Hosting | | - | | |
| ImgMoney Upload Extension | | - | | |
| Imgchili.com Upload | | - | | |
| Imgrill Uploader | | - | | |
| Imgur Uploader | | - | | |
| Imgur to Filmot | | - | | |
| In The News | | - | | |
| Inline Google Definitions | | - | | |
| Inline Google Search | | - | | |
| Inline Search | | - | | |
| Inline Translator | | - | | |
| InlineThumbnail | | - | | |
| InoReader Companion | | - | | |
| InoReader RSS Reader extension | | - | | |
| Inquisitor | | - | | |
| Insite Search | | - | | |
| InstaRead | | - | | |
| Install Collection | | - | | |
| Integrated GMail | | - | | |
| Integrated Google Calendar | | - | | |
| InterfaceLIFT NewTab | | - | | |
| Iwara Source Downloader | | - | | |
| Ixquick Toolbar | | - | | |
| J-WAVE ツールバー | | - | | |
| JaffaSites | | - | | |
| Janus | | - | | |
| Japan-newspapers | | - | | |
| Jigsaw Puzzle Maker | | - | | |
| Jingoo | | - | | |
| KDDI ChatWork チャットワーク シングルサインオン | | - | | |
| KJCLUB Basic Support | | - | | |
| KOSHIAN Catalog Marker | | - | | |
| KOSHIAN Favicon Changer | | - | | |
| KOSHIAN Float Form | | - | | |
| KOSHIAN Image Popuper | | - | | |
| KOSHIAN NG | | - | | |
| KOSHIAN Popuper Quote | | - | | |
| KOSHIAN Show Mail | | - | | |
| KOSHIAN autolink futaba | | - | | |
