| ikf | INTUS Terminal Keyboard Settings |
| ikmp | IK Sampletank Module Presets |
| ilc | Xpert.ivy Launch Control File |
| imo | iMON Manager Configuration |
| import | Godot Engine Import Settings Data |
| ini | Finale Playback Preferences Data |
| ini | Initialization File |
| ini-dist | PHP Distribution Default Settings Data |
| ins | Microsoft Windows Internet Settings File |
| inss | Mac OS X Setup Assistant ISP Info Data |
| interp | Gimp Interpreter Definition File |
| inz | Datalogic Lighter Configuration |
| ipcc | iPhone Carrier Bundle |
| ipk | iPack Configuration File |
| ipu | Vocaltec Internet Phone User Data |
| ir | Crestron BPC-HPLIR IR File |
| irbrc | Interactive Ruby Console Configuration Data |
| iros | Adobe Photoshop Save For Web Tool Settings |
| isp | Internet Sign-up Settings |
| iuux | Powerflex IUUX Configuration Data |
| ivc | InteliSea Vessel Configuration |
| iveset | Investigation Video Editor Settings Data |
| ixi | ixiQuarks Preferences Data |
| ixw | ERDAS Imagine Workspace Layout |
| jaas | JAAS Configuration File |
| jai | Jaikoz Audio Tag Editor Settings |
| jap | jAlbum Settings |
| jarx | Jarx Configuration |
| jcf | JAWS Settings Data |
| jcp | Jesusonic Preset File |
