Excel Viewer
Excel Viewer can be used to open, view and print Excel files (workbooks, spreadsheets), even if you don't have the full version of Excel...
Visio Viewer 2010
From Microsoft: 'The Visio Viewer 2003 allows anyone to view Visio drawings and diagrams (created with Visio 5, 2000, 2002, 2003, 2007, 2010) inside...