| hlkx | Windows HLK Studio Package |
| hpa | Hyper Patch Archive |
| hpk | HPack Compressed Archive |
| htr | Haptek Compressed Archive |
| htz | Web ScrapBook Zipped Archive |
| hv3 | HoneyView 3 Archive |
| hyp | Hyper Compressed Archive |
| hzq | CrossWorks for ARM Package |
| iar | OpenSimulator Inventory Archive |
| ibf | Instant Backup Archive |
| icap | Adobe InCopy CS4 Package |
| ice | ICEOWS Archive |
| icspkg | Intellitools Classroom Suite Package |
| idap | Adobe InDesign CS4 Package |
| idpk | Adobe InDesign Package for GoLive |
| ifg | Samsung IFG Theme Package |
| igl | igLoader Plugin |
| ikm | Ideal Kitchen Monitor Backup Data |
| imscc | Canvas Course Export Package |
| incp | Adobe InCopy CS3 Package |
| indp | Adobe InDesign CS3 Package |
| inr | SAP BR Tools Incremental Backup Archive |
| ipd | BlackBerry Phone Backup |
| ipg | iPod Game Package |
| ipk | Zaurus Install Package |
| ipsw | iPhone / iPod Software Update |
| iqb | AmeriCalc Backup |
| iqzip | Inquisit Script Package |
| irz | iROS Application Package |
| isdocx | ISDOC Archive |
