There was a download of Oligarc 3.0.3 on the developer's website when we last checked. We cannot confirm if there is a free download of this software available. The software is included in Multimedia Tools. The most popular versions of the software are 3.0 and 1.0. Oligarc is compatible with Windows XP/7/8/10/11 environment, 64-bit version. We recommend checking the downloaded files with any free antivirus. The actual developer of the program is Stillwell Audio LLC.
From the developer:
Oligarc is a collection of four world class audio effects, tied together by a set of modulation sources that can act on various parameters of each effect.
Oligarc excels at gentle, tasteful ear-candy.
You may want to check out more software, such as Oligarc Filter, which might be similar to Oligarc.