Free PowerPoint Templates (POT) for download:
1. http://powerbacks.com e.g. http://powerbacks.com/pages/business-finance.html 20MB contains many POT.
2. 112 free PowerPoint templates:
http://www.presentationhelper.co.uk/free_powerpoint_template.htm
3. Also, you can download from microsoft
PowerPoint Templates Pack 1:
http://www.microsoft.com/downloads/details.aspx?FamilyId=3A8B90AC-2BCB-4FEC-A8B4-BFBD509BAEFB&displaylang=en
PowerPoint Templates Pack 2:
http://www.microsoft.com/downloads/details.aspx?FamilyID=e903488f-0f1d-4cae-aa2f-6de7afc8db59&DisplayLang=en
PowerPoint Templates Pack 3:
http://www.microsoft.com/downloads/details.aspx?FamilyID=47cedf97-b910-4a17-96c8-18c155492a9a&DisplayLang=en