I just found out that the International Organization of Standarization (ISO) has approved the PDF as a standard format for electronic files. PDF stands for Portable Document Format. Adobe submitted the format to ISO for standarization in February 2007. You can read more from the article on the Redmond Developer News web site (article here).
The important thing about this is that from now on there will be more development of PDF readers and more integration with different tools. Adobe Acrobat Reader has been one of the most used PDF readers, which is totally normal since Adobe created the PDF digital document format back in 1993. If you want to learn a little about the ADOBE PDF format check out Wikipedia (article hre).
There are many PDF tools out there that allow you to create, convert or simply view PDF files. Some of them are Sumatra (Windows), Zamzar (Web Based), Skim (MAC) and Foxit Reader (Multi-Platform). If you want to have more references to this tools, check out this wiki page.
I’m sure we will see a lot of improvements and new tools coming out soon, so stay tune !!!