Adobe Reader is a big program and takes 10-15 seconds to start. You cannot edit or add text to a PDF unless a form is embedded specifically for that purpose.
Foxit Reader deals with those limitations in a heartbeat. This small 1.7-MB program starts in just one second and the Typewrite features allows you to add text to any PDF despite the fact that the form entry may not have been embedded originally. The Foxit Reader is free and its counterparts of Adobe Acrobat (Editor, Creator) are reasonably priced at $ 50-100 compared to more than $ 500 for Adobe Acrobat Professional.
I have heard about Foxit before but never got around to try it. Last week I read that Larry Page insisted for months that Google included Foxit instead of Adobe Reader in Google Pack and decided to give it a try. The current version of Foxit Reader is a significant improvement over Adobe Reader, adds useful features, has a small foot print and is easy to use.
Foxit Reader from Wikipedia, the free encyclopedia.
PDF Hammer -- edit your PDF files online for free.
Image source: Foxit
16 Free Online Tools for Working with PDFs. DavidRothman.net, 03/2008.