| .3dl |
iGO Landmark File |
| .3dz |
Nintendo 3DS ROM |
| .8st |
8start Launcher File |
| .256 |
Descent 2 Color Palette File |
| .asp |
Active Server Page |
| .avs |
AVS Preset File |
| .alx |
BlackBerry Application Loader XML File |
| .acrobatsecuritysettings |
Adobe Acrobat Security Settings File |
| .application |
ClickOnce Deployment Manifest File |
| .appref-ms |
Microsoft Application Reference File |
| .ase |
Adobe Swatch Exchange File |
| .aux |
LaTeX Auxiliary File |
| .aip |
Advanced Installer Project |
| .atn |
Photoshop Actions File |
| .asl |
Photoshop Style |
| .ask |
askSam Database |
| .act |
ADPCM Compressed Audio File |
| .ams |
Adobe Monitor Setup File |
| .ahl |
eMule Metadata File |
| .ahs |
Adobe Halftone Screen File |
| .ast |
ClarisWorks Assistant File |
| .a2m |
TS-AudioToMIDI Settings File |
| .atz |
Aston Compiled Theme |
| .ait |
Adobe Illustrator Template |