| .ide |
GTA Item Definition File |
| .idt |
Windows Installer Database Text Archive File |
| .ipl |
GTA Item Placement File |
| .ino |
Arduino Sketch File |
| .ibb |
ImgBurn Project File |
| .inf_loc |
Windows Driver Information Cache File |
| .ipspot |
iPhoto Spot File |
| .iwb |
IWBasic Source Code File |
| .ipynb |
Jupyter Notebook |
| .iges |
IGES File |
| .iqy |
Internet Query |
| .int |
Fallout Compiled Script |
| .ipp |
Inline Guard Macro File |
| .imp |
Improv Spreadsheet |
| .indk |
Adobe Shortcut Set File |
| .ical |
iCalendar File |
| .icalendar |
iCalendar File |
| .icf |
Zoom Router Configuration File |
| .ign |
RoboHelp Ignore List File |
| .iadclass |
iAd Producer Plugin Class Description File |
| .iadcomponent |
iAd Producer Plugin Component File |
| .iadaction |
iAd Producer Plugin Action Template |
| .ilogicvb |
iLogic VB File |
| .ibro |
IncrediBots Robot File |