For a VCL migration session I recorded a short video covering some open source components recently upgraded to XE7 compatibility and collectively called "Turbo Pack". I blogged about these components last October on blog.marcocantu.com/blog/2014-october-turbopack-xe7.html. You can find the project code direct links in Roman’s blog at blog.kassebaum.eu/?p=379.
The video below has a short introduction to the various components and the idea behind their "modernization", followed by the updated version of a classic Virtual Tree minimal demo and a one-minute introduction to a handful (out of the hundreds) of components in the Orpheus package, as you can see below: