| idb | Intuit Quicken Home Inventory Data File |
| idb | PocoMail Index |
| idb2 | InfoStat Database 2 |
| idb2 | Q-MIDI Instrument Database |
| idc | Lotus Notes Certificate Data |
| idcl | Autodesk Inventor Content Library |
| ide | Sophos Anti-Virus Virus Identity Data |
| ide-shm | SQLite 3 Database Shared Memory |
| ide-wal | SQLite 3 Database Write-Ahead Log |
| idf | Autodesk Inventor Intermediate Data Format |
| idf | Autodesk Land Desktop Intensity Duration Frequency Data |
| idf | CircuitWorks Intermediate Data |
| idf | InspireData Data |
| idf | Intermediate Data Exchange File |
| idif | Netscape Navigator Addressbook Identification Data |
| idj | IDATG Java GUI Info File |
| idl | CRiSP Harvest Inter-Dam Loss Data |
| idm | Ulead PhotoExpress Message Data |
| idms | Adobe InDesign Snippet |
| idoc | SAP IDoc File |
| idos | Plaque Simulator Custom Isodose Data |
| idpp | Adobe InDesign Preflight Profile |
| idrc | Adobe InDesign Resource |
| idrm | Tekla ID Mapping File |
| idroo | IDroo Data |
| idsp | eXtendable Wad Editor IDSP Data |
| idu | Interleaf Desktop Utility |
| idvi | eXtendable Wad Editor IDVI Data |
| idx | Canon ZoomBrowser EX Database Index |
| idx | Citrix Program Neighborhood Database Index |
