ActivityOwner.com MarkTaskComplete 1.0 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. The software is categorized as Business Tools. The following version: 1.0 is the most frequently downloaded one by the program users. We recommend checking the downloaded files with any free antivirus. This free program is an intellectual property of Creative Commons.
From the developer:
Mark Task Complete provides a number of useful features for managing tasks in MindManager. Repeating-tasks are designated by adding one of the strings below to the category field (see table below). These are now readily accessible on the MindManager ribbon. In general repeating tasks are advanced either from the due date ("each" keywords) or from the date you actual mark them done ("every" keywords).
You may want to check out more software, such as Oracle Data Integrator, Pivot Table Helper or MetalKid's Pokemon Program, which might be similar to ActivityOwner.com MarkTaskComplete.