On some websites, there are fixed mini contact forms on the bottom corner of a web page. An example website is Olark.
I couldn't find out the name of this kind of form apps.
Does anybody know what they are called and is there any ready made component or tutorial how to implement them?
Note: There is a similar widget question here as well: What is the online survey/feedback widget that looks like "[+]" (a crosshair) in the bottom right