| .ADOC | Stuart Rackham | Arquivos 3D | AsciiDoc File | TextPad | Helios Software Solutions |
| .BIB | Oren Patashnik | Arquivos de Texto | BibTeX Bibliography Database | TextPad | Helios Software Solutions |
| .EW | OpenEuphoria | Arquivos de desenvolvedor | Euphoria Source Code File | TextPad | Helios Software Solutions |
| .EX | Symantec Corporation | Arquivos de configuração | Norton Ghost Template Data | TextPad | Helios Software Solutions |
| .EXW | OpenEuphoria | Arquivos de desenvolvedor | Euphoria Source Code File | TextPad | Helios Software Solutions |
| .FAQ | The Document Foundation | Arquivos 3D | Frequently Asked Questions Document | TextPad | Helios Software Solutions |
| .HDM | Openwave Systems Ltd | Arquivos Web | Handheld Device Markup Language (HDML) File | TextPad | Helios Software Solutions |
| .HDML | Openwave Systems Ltd | Arquivos Web | Handheld Device Markup Language (HDML) File | TextPad | Helios Software Solutions |
| .PHL | Amazon | Arquivos eBook | Kindle Popular Highlights File | TextPad | Helios Software Solutions |
| .SKI | Motorola | Arquivos de configuração | Motorola Phone Skin File | TextPad | Helios Software Solutions |
| .SMS | Sega | Arquivos de jogos | Sega Master System ROM | TextPad | Helios Software Solutions |
| .SYN | Image-Line | Arquivos de áudio | SimSynth Document | TextPad | Helios Software Solutions |
| .TCL | Open Source | Arquivos de desenvolvedor | Tcl Script | TextPad | Helios Software Solutions |
| .TOPC | 3d-scape Limited | Arquivos de dados | TopicCrunch Project File | TextPad | Helios Software Solutions |
| .TWS | Helios Software Solutions | Arquivos de configuração | TextPad Workspace | TextPad | Helios Software Solutions |
| .Y | Microsoft Corporation | Arquivos de imagem Raster | Subsampled Raw YUV Image | TextPad | Helios Software Solutions |
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