RIOT 1.27 was available to download from the developer's website when we last checked. We cannot confirm if there is a free download of this software available. RIOT can be installed on 32-bit and 64-bit versions of Windows XP/Vista/7/8/10/11.
This free software was originally produced by Lucian Sabo. We recommend checking the downloaded files with any free antivirus. The default filenames for the program's installer are Riot.exe, RiotClient.exe or ZinstallHostUtility.exe etc. The most popular versions of the tool are 1.2, 1.0 and 0.5. The software lies within Photo & Graphics Tools, more precisely Viewers & Editors.
From the developer:
Radical Image Optimization Tool (RIOT for short) is a free image optimizer that will let you visually adjust compression parameters while keeping minimum filesize. It uses a side by side (dual view) or single view interface to compare the original image with the optimized one in real time and instantly see the resulting file size.
You may want to check out more software, such as LuxRiot Digital Video Recorder, Caesar IV or League of Legends, which might be related to RIOT.