See how C-Organizer looks on the screenshots below.
Click any image to enlarge.

Today mode. Summary information for 3 days.

Calendar mode. Classic layout with tasks panel.

Calendar mode, list of entries with colored categories.

Tasks manager, tree-like list of entries with colored categories.

Contacts mode, record preview window opened.

Calendar of Events, tree-like structure, colored categories.

Standard interface style. "Caramel" color scheme.

Ribbon interface style. "Money Twins" color scheme.

Ribbon interface style. "Black" color scheme.