Adobe Reader XI comes with complete support for Windows 8 and Mac OS X Mountain Lion. This means that the users will be able to use the PDF reader on touch enabled devices.
Now you can convert your PDF documents into Word or Excel online for free. This feature is free for one year. The PDF annotator is also an amazing introduction as this will enable teams to collaborate on the same PDF file and the collaboration remains within the file itself.
The performance of Adobe Reader has always been questionable because it took large amounts of memory to open a single PDF file. This alone has forced the users to switch to other PDF readers like Foxit Reader and Nitro PDF Reader.
I tested the memory usage of three PDF Readers, Adobe Reader XI, Foxit Reader and Nitro PDF Reader. The results were quite satisfactory for Adobe Reader. I opened the release notes PDF file in the three readers and here are the results:

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