Photomatix Pro costs $99 and is a standalone programs running on Windows and Mac.
The HDR Batch Plugin costs $49 and runs in Adobe Lightroom.
Photomatix Real Estate Camera runs on iPhone. Its in-app purchase option costs $9.99.
26 May 2021: The HDR Batch Plugin for Lightroom has been updated to version 2, adding the creation of unprocessed 32-bit HDR images, and saving as 32-bit DNG, 32-bit TIFF and OpenEXR.
14 July 2020: Photomatix for Linux updated to version 2, adding a Straightening tool, the Fusion/Interior HDR method, OpenEXR open/save and CR3 support.
5 March 2019: Photomatix Real Estate Camera, an iPhone app for taking high-quality real estate pictures without photography expertise, now available on the App Store.
13 August 2017: Q&A on using HDR for a solar eclipse based on the questions from a user preparing to photograph the August 21 eclipse.
30-Sep-14: Photomatix Essentials updated to version 4, adding realistic-looking Tone Mapping and Finishing Touch options among other updates. Photomatix Essentials is an easy-to-use program intended for photographers who are new to HDR.