Hello,
We are a team of software engineers with extensive experience working on unorthodox web applications. An in-place editing application is firmly in our range of expertise.
We have been working with html5 canvas animated elements with and without webGL, and various CSS3 animations, mostly with svg elements with support od D3.js.
As per in-place editing, we have even more experience with modern javascript frameworks that enable web content to be editable such as Angular.js, backbone.js, Polymer and WebComponents.
Regards,
W3ARCH IT