Sumatra PDF 1.5 released on Apr 23, 2011, and includes more important features,

• add support for viewing XPS documents
• add support for viewing CBZ and CBR comic books
• add File/Save Shortcut menu item to create shortcuts to a specific place in a document
• add context menu for copying text, link addresses and comments. In browser plugin it also adds saving and printing commands
• add folder browsing (Ctrl+Shift+Right opens next PDF document in the current folder, Ctrl+Shift+Left opens previous document)

btw,
Last week, I noticed MuPDF trunk adds XPS support, but still has some bugs in windows registers.

Today, I heard from Mark Summerfield

Hi Steven,

I’ve just released DiffPDF 1.2.0.

There are small improvements in the user interface plus a tiny bug fix
of one setting that wasn’t saved/restored correctly.

I am hoping that this will be the last release for quite a while!

I’d be very grateful if you’d create a statically built Windows version:
your build for 1.1.5 is proving very popular!

Thanks:-)

So I compiled and released it in the first time, feel free to download it here

P.S. Change logs

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