If a client emailed you a PDF with a combination of pages in portrait and landscape mode, some pages may display at a 90-degree angle. Adobe Reader lets you rotate the view so you can easily read this ...

Although the name suggests you can use it to look at pictures, scans and faxes, Windows Picture and Fax Viewer enables you to perform some basic editing as well. For instance, you can rotate an image ...

I took some videos with my new Canon Powershot that I took while orienting the camera in portrait. The camera will automatically play them in portrait, but the .avi files transfer to disk in landscape ...