PDFZone has presented an array of available solutions for viewing PDF files on mobile devices. Any solution is going to be limited with a small screen and generally non-reflowable text, although certainly some PDF documents can be reflowed.
Here's the lineup they provide:
Palm OS
*
Dataviz Documents To Go Premium Edition Version 8.0 (Cost is $49.99, or upgrades for $29.99).
*
Picsel File Viewer
Blackberry
*
Terratial DocHawk (subscription web service)
Symbian OS
(Nokia Series 60 smartphones, including Nokia 6660, Nokia 3650, Nokia 7610 and the Siemens SX1.)
*
mBrainsoftware's Pdf+
*
Picsel File Viewer
* The Dataviz product listed under PalmOS. It also runs on Symbian OS-based UIQ and Symbian OS-based Series 80 devices.
Windows Mobile
*
Cerience Repligo Professional
*
Picsel File Viewer
You may be thinking that Adobe offers some mobile PDF viewing software also. Probably true, but unless things have drastically changed, for most people it isn't really worth using.
See the
PDFZone article for futher information about these alternatives.