Hugely popular freeware PDF viewer
Platform: iPad, iPhone
License: Free for personal use only
Adobe Acrobat Reader is free software that lets you view and print Adobe Portable Document Format (PDF) files.
Adobe PDF is the open standard for worldwide electronic document distribution. Documents converted into PDF format preserve all the formatting, colours and graphics of the original document, regardless of the application or platform used to create it.
The PDF format is the workflow standard for the publishing industry, and is increasingly being used in financial services, regulated industries and governments.
With Adobe Acrobat Reader you can also complete and submit PDF forms online, a handy tool as more and more companies begin to embrace the technology.
Note that this is the iOS version.