| .123 |
Lotus 1-2-3 Spreadsheet |
| .12m |
Lotus 1-2-3 SmartMaster File |
| ._xls |
Renamed Microsoft Excel Spreadsheet |
| ._xlsx |
Renamed Microsoft Excel Open XML Spreadsheet |
| .ast |
ClarisWorks Assistant File |
| .aws |
AutoCAD Work Space File |
| .bks |
NTBackup Settings File |
| .cell |
Thinkfree Office NEO Cell Workbook |
| .dex |
Dalvik Executable File |
| .def |
M.U.G.E.N. Character Definition File |
| .dis |
Oracle Discoverer Workbook |
| .dfg |
Data Flask Grid File |
| .ess |
The Elder Scrolls Saved Game |
| .edx |
Edraw XML FIle |
| .edxz |
Edraw Compressed XML FIle |
| .fm |
FrameMaker Document |
| .fcs |
Flow Cytometry Standard File |
| .fp |
FileMaker Pro Spreadsheet |
| .fods |
OpenDocument Flat XML Spreadsheet |
| .gsheet |
Google Drive Spreadsheet |
| .gnumeric |
Gnumeric Spreadsheet |
| .gnm |
Gnumeric Spreadsheet |
| .hcdt |
Thinkfree Office NEO Cell Template |
| .imp |
Improv Spreadsheet |