Pocket Informant 8.51
the author of this app says:
Pocket Informant is The Next Generation in Personal Daily Management, but we don't just say that; we prove it. Pocket Informant 8 doesn't just simply let you work with your daily events through lists and grids, but with the new Events and Journal views you can also look at your life's past and future in an easy cohesive environment. You can even have Contact Links directly in the subject of any task or appointment! Most surprisingly, this power doesn't come at the cost of a slow, complicated, cluttered interface.
See Home Page for other mobile device compatible versions.