Additional required or recommended binaries can be downloaded for the following applications:
Kigo is a go frontend which needs a backend. To make it work properly, you need to install that backend and point kigo to it.
KCachegrind is a profiler frontend. For visualization it needs graphviz.
Cantor is an application, aimed at providing a nice worksheet view to other Free Software Math packages.
Kile is a LaTex editor and Frontend