Those are probably just icons that were put there by your carrier and not installed apps, since you don't see them. Hide the icons if you don't want to see them. If you delete, they will probably just get pushed back anyway.
OS 6 takes a lot of space on a 9700 and doesn't leave much for apps. Make sure that you have all photos, music and ringtones offloaded to the SD card.
And maybe this from our FAQ will help: How do I free up memory on my device? - BlackBerryFAQ