@Krogger: If you go into settings, select "apps." Then swipe over to the "all" tab and click on the offending apps. You can't uninstall them without rooting your phone (not recommended for non-pros). But you can click "disable" That will at least make them stop wasting system memory and killing your battery.
@Krogger: Ah, bloatware. How we hate you.
@RaphaelOssai: There are a few possible reasons. Devices get warmer while being charged, but if you're out and about a single app might be responsible. If it's in a case, take it out and let it breathe. Close all apps and use them one by one until you find the culprit and can uninstall or update it. If you still have issues, try restarting or a factory reset (after backing up!).