Download of OpenPaint 5.0.1740.1 was on the developer's website when we last checked. We cannot confirm if there is a free download of this software available. The default filenames for the program's installer are mspaint.exe or mspaint98.exe etc.
We recommend checking the downloaded files with any free antivirus. OpenPaint lies within Photo & Graphics Tools, more precisely Viewers & Editors. The most popular versions of the program 5.0 and 1.2. This free program was originally created by Steven Jedlicka.
From the developer:
Open Paint is an open source image editor for all major operating systems. The goal of this application is to create a simple to use image editor that has all the functionality an average computer user would need. This leaves GIMP and Paint.NET for professional users and allows the project to focus on ease of use and intuitive interface over feature completeness.
You may want to check out more software, such as Wire Pilot Plugin, Flash MX or Batch JPEG Rotator, which might be related to OpenPaint.