| iis | Panasonic Camcorder IIS Metadata |
| iix | SDL Trados Translation Memory Index |
| ijf | IDIS Job Data |
| ijg | Independent JPEG Group Related Data |
| ike | IKE-Scan Data |
| iklax | AirParrot Media Data |
| ikn | IKinema Rig Data |
| il3 | ParticleIllusion 3 Library |
| ilabel | iData 3 Template Label Data |
| ild | ILDA Frames |
| ilda | ILDA Frames |
| ileaf | Interleaf Desktop |
| ilf | Alim Data File |
| ilg | LaTeX Index Generation Log |
| LinkOne Internal Data |
| MakeIndex Error Log |
| ilht | Mac OS X Finder Internet HTTP Location |
| ilib | ClarisDraw Art Library |
| ilight | iClone Light Data |
| ilm | MotionTracking Illumination Correction Data |
| ilo | HP ILO Recorded Console Session |
| ilock | iData Lock Data |
| ilogicvb | Autodesk Inventor iLogic VB Script |
| ilp | Gurobi Optimizer Temporary Data |
| ilr | Unity License Request File |
| ils | RFM Instrument Line Shape File |
| ilt | SpectrILight III Saved Spectrum Binary Data |
| ilx | Interlex Vocabulary Data |
| im | Wild Magic 5 Image Data |
| im0 | 3DVIEWNIX Scene Data |
| im4m | IMG4 Signature Data |
| im4p | IMG4 Payload Data |
| ima | Act! E-Mail Message |
| ImageMixer Data |
| IncrediMail Animation Data |
| System Mechanic Image Data |
| Zemax Image Surface Data |
| image | OpenQwaq Image |
| imagecache | Android Image Cache Data |
| imap | IceWarp Mail Server IMAP Data |
| imapmbox | Apple Mail IMAP Mailbox Data |
| imb | IncrediMail Address Book |
| Source Insight Main Symbol Index |
| imd | Caseware IDEA Data |
| Integration Manager Database |
| Microsoft VisioModeler Dictionary Model |
| Source Insight Main Symbol Index |
| imdl | iClone Model Data |
| ime | IncrediMail Emotions Data |
| Windows Input Method Editor Data |
| imeshdef | iMesh Skin |
| imesx | Microsoft Office IME Search Provider Definition |
| imf | IncrediMail Letter File |
| Tacx Fortius Data |
| img | Magellan eXplorist Map Image |
| img3 | Apple iPhone IMG3 Data |
| img4 | Apple iPhone IMG4 Data |
| imh | IncrediMail Contacts Export Data |
| IRAF Image Format Header |
| imi | IncrediMail Graphic Data |
| Magellan eXplorist Map Image |
| imiss | PLINK Individual-based Missing Data Report |
| imk | IncrediMail License Key |
| iml | Act! Internet Mail Message |
| imm | IncrediMail Deleted Message Data |
| immodules | GTK+ Input Method Modules Data |
| imn | IncrediMail Notifier |
| imotion | iClone Motion Capture Data |
| imovieevent | iMovie Event Data |
| imovielibrary | iMovie Library Data |
| imovieproject | iMovie Event Data |
| imovieteams | iMovie Teams Data |
| imp | Adobe Audition Convolution Effect Data |
| Esko FastImpose Imposition Data |
| impd | VivaImpose Template |
| impo | MoneyWorks Import Data |
| impx | Bentley Map Import XML Data |
| imr | IncrediMail Notifier Data |
| Inertial Explorer IMU Data |
| RM Information Magic Data |
