About a week ago, I received an email from a visitor about my QR code post which I blogged about back in 2010. I have been told that the most important reference was down. It was the reference to the DLL for generating the QR codes. So I uploaded the DLL as mirror Apparently the twitt88.com website is back online at http://platform.twit88.com/projects/mt-qrcode/files It also seems that there has been some new releases for the DLL. Since 2011 you only use NuGet to keep your packages up to date, I thought that adding it through NuGet would be the best option.