Delete apps from your Samsung Captivate and free up some space. You can delete apps that were downloaded and installed from the Android Market. You are not able to use these steps on apps that came pre-loaded with the ROM unless you hack/root your phone.
1. From the Home screen, press Menu.
2. Tap Settings.
3. Select Manage Applications.
4. Select Applications.
5. Select the app you wish to remove.
6. Tap Uninstall.