Hello,
I have made an application: Qtrainer.
It is a personal home trainer (currently only for powertraining)
It plots your progress,
tables your datapoints,
plans your trainings,
shows training schedules.
Qtrainer isn't finished yet but I was wondering, what you think about it.
You can install Qtrainer in Linux and Windows:
http://tuxer.ulyssis.be/homepage/qtrainer.html
or
http://kde-apps.org/content/show.php/Qtrainer?content=60499