Project Planning Software

"Is there a software programme which is designed to track progress on  a wide range of actions for a Strategic Plan, and to facillite easy reporting on progress?"

There does not appear to be much software to support the management of strategic plans specifically.  QuickPlanner Plus claims to aid one in the development of a strategic plan, but does not appear to offer any tracking/reporting functions.

You can, however, get a free trial for 5 days.

Project management tools, however, are far more abundant.  Many big commercial CRM tools, e.g. Salesforce or Goldmine, include project management tools, e.g. assignment of tasks to people, assignment of people to projects, timelines, gantt charts etc.  You could also look at Microsoft Project, as a standalone project management solution.

However, there's also lots of good stuff freely available for download from the internet, e.g. 

http://ganttproject.biz
http://www.openproj.org/

Both of the above are open source, so completely free alternatives to Microsoft Project.

The http://www.jxproject.com is another promising alternative.  This is not open source, but it displays ads in the top right of its window, so they can give it away for free.