If you got them from Cydia, they have to be removed from Cydia.
Open Cydia. Tap "manage" icon in the bottom bar. Tap "packages." Find apps you want to uninstall. Tap. Tap "modify." Tap "remove."
The Cydia I have does not have a Manage tab at the bottom.
The newest version has changed I think.
Any suggestion?
Hmmm... do you see a tab/icon for "packages"?
No, I don't have a tab for packages either.
Just: Cydia, Sections, Changes, Installed, Sources and Search
Well, those things (Activator, Cydget, etc) are all apps.
Do you see anything that includes the word "java" or "script"?
Download CyDelete on Cydia and you can delete anything direct from the iPad or iPhone but be careful not to delete Cydia itself or your in a heap of trouble.