Our website provided a free download of Riverflow 1.0.0 for Mac. The actual developer of this free software for Mac is Katsuma Tanaka. The application belongs to System Tools.
From the developer:
Riverflow allows you to assign a two-finger gesture to an arbitrary action. For example, a circle gesture can be assigned to send ⌘R key event. Then you can reload the web page by drawing a circle on the trackpad. The app has an easy-to-use interface.
You may want to check out more Mac applications, such as Bulldog, Script Timer or Mood Mouse, which might be related to Riverflow.