BeBuzz Free allows you customize the LED color and create repeating audible reminders for incoming and missed calls. Plus it adds customizable vibrate for incoming calls. Finally you an have your BlackBerry vibrates while it is ringing
Upvise is a suit of applications for your Blackberry. It has the following apps contacts, notebook, RSS news reader, mobile bookmarks, wikipedia mobile and shopping list. What makes Upvise very special is the web base interface which allows you to encode information, bookmarks and enter news feeds. It even has a sync features
Got-2 Task Management- enables you to create list and even sub-list of the things you have to do. You can cross of the list you have completed with the 3 different views you can use. I usually use the agenda view which I think makes things even more simple. But the list view and even the geographical view is great
Mara Tick is a simple free list manager. You can create your own set of list for anything you want. Creating a new list is so easy you just enter a name or description of your list and it will ask you set a deadline on when you should complete the list. If you set a completion date Mara Tick will even display a reminder in your Blackberry's calendar on when it's due
