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.

wkhtmltopdf is a simple shell utility to convert html to pdf using the webkit rendering engine, and qt.
pdf2swf(part of SWFTOOLS) is A PDF to SWF Converter. Generates one frame per page. Enables you to have fully formatted text, including tables, formulas, graphics etc. inside your Flash Movie. It’s based on the xpdf.
Both of them are open source and can works on multi-platform(cross platform), so If we want to convert a html file or webpage to SWF, we can use wkhtmltopdf to convert html(webpage) to PDF, then use pdf2swf to convert pdf to swf.

reference,

• SWFTOOLS home page, http://www.swftools.org/
• wkthmltopdf home page,http://code.google.com/p/wkhtmltopdf/

P.S. A simple routine and example(result),
wkhtmltopdf "http://www.grzmobile.com/blog/2009/11/13/integrating-lua-into-an-iphone-app.html?printerFriendly=true" "Integrating Lua into an iPhone App.pdf"
pdf2swf "Integrating Lua into an iPhone App.pdf" "Integrating Lua into an iPhone App.swf"

• Html example(a webpage),Integrating Lua into an iPhone App
• the Integrating Lua into an iPhone App.PDF created with wkhtmltopdf
• the Integrating Lua into an iPhone App.swf created with pdf2swf

On WWDC 2010 we noticed some changes to Section 3.3.2 of Apple’s licensing agreement — specifically the part that deals deals with the use of cross-compilers. The changes this time around may not make things all better, but it could make things slightly better for some developers. Matt Drance had this to say about the change to Section 3.2.2:

“While explicit approval from Apple is still required, these new terms seem to acknowledge that there’s a difference between an app that happens to have non-compiled code, and a meta-platform. It’s a step that should allow for many new possibilities.”

And because of the features of Lua,

Lua is a powerful, fast, lightweight, embeddable scripting language.
Lua combines simple procedural syntax with powerful data description constructs based on associative arrays and extensible semantics. Lua is dynamically typed, runs by interpreting bytecode for a register-based virtual machine, and has automatic memory management with incremental garbage collection, making it ideal for configuration, scripting, and rapid prototyping.

,
then one guy wrote two tutorials, Integrating Lua into an iPhone App and Remote Debugging for Lua on the iPhone.
If you are not familiar with Xcode but familiar with Lua, maybe you can try iLuaBox.

P.S.

iLuaBox is an iOS application that hosts the Lua scripting environment. iLuaBox provides an intuitive environment to learn, write, and test scripts written in the Lua Programming Language. This is not a stripped down version of Lua, but rather a full-featured implementation that is optimized for iOS and the iPad hardware platform.