RISC OS One

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Welcome to the new RISC OS One website

Posted by RISC OS One Fri, 11 Sep 2026 12:00:00 GMT

RISC OS One has a new home. Everything now lives in one place, with a single account for all of it:

  • Downloads for the Frosted ROMs, theme, HardDisc4 image, browsers and Viewer
  • The Library for RISC OS One guides and the Programmer's Reference Manuals
  • Forums for help and discussion
  • A bug tracker for problems with releases

Create your account to join in.

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RISC OS Viewer 1.0.4 alpha is out

Posted by RISC OS One Mon, 24 Aug 2026 12:00:00 GMT

The first alpha of Viewer is now in Downloads.

Viewer opens PDF, JPEG, PNG, GIF, BMP, TIFF and Photoshop files, Draw and ArtWorks drawings and sprites, and gives text previews of Impression and Ovation Pro documents. Wherever it can, it draws them with RISC OS's own renderers.

It's an alpha, so please report anything that goes wrong in the bug tracker.

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Frosted ROMs for Raspberry Pi, Iyonix, iMX6 and Titanium, plus the HardDisc4 image and the Frosted theme.

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Programmer's Reference

Find the RISC OS 5 Programmer's Reference Manuals and RISC OS One guides in the Library.

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