I used myDiary 2 as the name implies, a daily diary. It is easy to use and it dates and timestamps each entry. And it shows a month at a time so you can thumg through monthly entries.
The improvements I would suggest is that, when you set a font, it remembers the font between restarts so that you dont lose the setting. Believe it or not, there are more readable fonts than Sans Serif, and 24 points is much too large.
Capt.Huffnpuff about MyDiary 2