Last week, I installed Cloudfare for our website. I found that is very useful. It has CDN. That is great for oversea visitors. I used our Singapore box for testing. In that box, we loaded our Australia website from there. That is much faster, I think 100% faster! Moreover, it can blocked some known threats for the website.
Lastly, that is easy to setup. All I need to do is pointing the dns to Cloudfare. That is so easy!
I love this tool!

My company can buy an online shop in a very cost-effective way by using several open source technologies. We got some good technologies, but that is not enough. The key is marketing. Now, we are thinking about the promotions. We have to let all potential clients know about that. I think after we mastered the technologies, then we have to put some good effort on marketing.

There are a number of ways to create a pdf file by using open source software. For example, openoffice can export their document files into PDF. But How's about others file type? For example, how can I export a web page into PDF?
I found the best way is getting a PDF Printer driver. I just need to open the file and print it into a PDF Printer. Then it will "print" into a pdf file. I am using PDFCreator to do this task. It is free and opensource.