Bonjour,
I have worked on my app RealCADD to add the possibility to annotate and edit pdf files.
There is still some problems, for example to annotate with rotated texts or to edit complex pdf files or with some texts but I am happy with the results, thanks to Christian and the dynaPDF plugin.
If you are interested, go here to see my post on my forum and download the beta version with this new features.
Thanks.