"In Ubuntu, this means going to the Applications > Add/Remove
menu item or the more advanced System > Administration >
Synaptic Package Manager. Don't clutter up your system with stuff
with which you experiment and then don't use. You can always add it
back in later. By that time it will probably be at a higher
version, more functional, and less bug ridden.
"I installed the Doomi Adobe AIR-based todo list manager but
then started playing with the online Remember The Milk system. I
still have both of them available and will play with each of them
some more, when I remember to do so. Remember The Milk is
extraordinary in the number of services and Web 2.0 add-ons and
extensions that support it."