There was a download of Tunafish 1.8.0.213 on the developer's website when we last checked. We cannot confirm if there is a free download of this software available. We recommend checking the downloaded files with any free antivirus. This program was originally developed by Bram Bos.
Tunafish works fine with 32-bit versions of Windows XP/Vista/7/8/10/11. The most popular versions among the software users are 1.8, 1.7 and 1.6. The program is included in Multimedia Tools. Tuna.exe or Tunafish.exe are the frequent file names to indicate this program's installer.
From the developer:
The Tunafish philosophy: a low-cost, lightweight sequencer that's as simple as possible yet with the versatility of a big sequencer. Stripped of confusing, exotic bells & whistles, focusing on what's essential and fun
You may want to check out more software, such as Easy Video to MP4 Converter, Creative ALchemy X-Fi Edition or BlindWrite5, which might be related to Tunafish.