There hundreds if not thousands of photo viewing/modifying packages around.
Painsthop pro is one of the best end user packages but isnt cheap that can modify pictures, remove red eye, resize, recolour etc etc. A cheaper Image viewing only package is ACDSee.
A simple picture viewer thats free Id suggest:
Using Infranview
Another alternative is a album viewer such as My Album
There are many free tools out there .. Websites like Tucows or ZDnet specialise in hosting free/share/payware.
You can find both packages I suggested and more on this website Here
P.S. If your sending pictures.. You might want to consider saving the pictures as .JPG format as .BMP ( Bitmaps ) are roughly 10 times the size and are only really of use when using paint packages. Also most internet browsers view .JPG format files by default.