Task Till Dawn is Java-based freeware that will launch applications, open files, run shell scripts; if you can double click on it in the Finder, Task Till Dawn will open it for you on whatever schedule you set, and scheduling is what this application is all about.
ClipList is a simple and straightforward utility that can capture multiple copy or cut commands, and save them in a drop-down list that's accessible through a menu bar item.
Mindful presents your calendar on your desktop, but under any windows or icons. It's unobtrusive yet still easy to access.
This tutorial will show you how to clear your browser history in each of the most popular Web browsers for the Mac.