Nokia Sports Tracker - at least the web service together with eCoach

Spotify

Papers - http://mekentosj.com/papers/

A proper dictionary and thesaurus

1Password

An outliner - e.g. OmniOutliner

A mind mapping application

Squirrel - http://www.squirrelapp.com/

Spotlight style searching and app laucher

A similar app to Offshoots - http://projects.digitalwaters.net/index.php?q=offshoots

JoikuSpot