Install Titanium Backup. There is a free version. Then find the apps you want to remove, and use the Freeze feature in TiBu first for a while to make sure that there are no dependencies. It functions just like deleting the app, but you can unfreeze it if there are problems. You can also delete apps with TiBu.
Also use this to back up your applications. To make it easier, buy the full version from the developer, which has batch back up and other features. It's a pain to try to back up apps one at a time.
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