A fun way to learn... and inform the rest of us...
Root your phone(if u haven't), install CWM, MAKE A BACKUP of your phone, get titanium backup, ... then remove each app individually and reboot after you have removed the app... if you boot up normally and don't get any force close popups then you're all good... if the phone does not boot or messes up just go into CWM and restore your backup...
Have fun, its a great way to learn your phone
Report back on here your findings!!!
I say to do it this way because non of us know more than A few of them apps