On November 18, 2010, I recommend diffpdf-an open source PDF compare software

On March 19, 2011, Diffpdf 1.1.4 Dev Test 1 released by Simeon

and Today, Mar 31 ,2011, New: Diffpdf Portable 1.1.4 (PDF file comparison) Released

Many thanks to

Mark Summerfield, he develops such a great software

Simeon, he made the portable version

btw, DiffPDF 1.1.5 Win32 version is also out, looking forward the portable version.

DiffPDF Portable Release News Screen shot

Because my  MinGW Cross Compiling Environment includes compiled Qt4, after successfully compiled poppler-0.6.13 (with the Poppler Qt4 interface library, libpoppler-qt4), I decided to compile the last version of DiffPDF, after some effort, the Win32 Static version is out, is only 4M an only one exe file, without any library.

Feel free to download the last version from DiffPDF Win32 binary download page.

P.S. Change log of  1.1.5,

Slightly changed the .pro file to make it a tiny bit more helpful.

Added a Help button and separated Help and About information.

Updated the README for Mac users (thanks to Dirk Loss for the info).

yesterday(Nov 17, 2010), I received a requirement email from my Batch ReaderEnable customer,

I contacted you for a advise on PDF compare. we do have a requirement to Comparing the version of PDF files, when we are using Acrobat inbuilt compare options, it’s comparing only the text and it’ll miss out the formatting elements (bold, italic, superscript, subscript, bolditalic etc), it caused lot off manual work and time consuming, do you have any idea or software for this, if so please inform us, we will discuss the cost.

and I occurred to DiffPDF, a Free open source and cross-platform software that can compare two PDF in text and appearance mode. it is developed in Qt and bases on Poppler-qt.

P.S.
I has recommend it to PortableApps.com, and hope it can be accepted.