Suggest me some cool todo list or calender app

[coldhart]

I want app which i can use for store todo list something like calender entry first i liked google calender whose ui is pretty neat but it need chrome & gmail access so if there is any cool offline calender app for windows then plz suggest me

OS
windows 7 ultimate sp1 x64

 

[thetechfreak]

This Rainlendar

 

[coldhart]

thanks mate..........

 

[topgear]

try this :
EssentiaPIM