Yep some common ones there. I have an Galaxy S III (ICS) and in the pull down it has toggles for things like data, wifi, bluetooth etc. Does Jellybean not have that? This may be a Samsung customisation but plain Android installs I've used on my HD2 had them also.

I'm yet to find a good data usage counter by app. I have "Traffic Counter" and "Traffic Monitor Plus" and they're not quite what I want.

A few from me.

Agenda Widget (calendar widget that scrolls etc - very customisable)
https://play.google.com/store/apps/detai...24uYWdlbmRhIl0.

Battery Monitor Widget (good battery logger):
https://play.google.com/store/apps/details?id=ccc71.bmw

GPS Logger (logs GPS tracks in to kml files)
https://play.google.com/store/apps/details?id=com.mendhak.gpslogger

Lightflow (paid)
https://play.google.com/store/apps/details?id=com.rageconsulting.android.lightflow

Paw Server (good webserver type app for access to the phone over Wifi)
https://play.google.com/store/apps/details?id=de.fun2code.android.pawserver

SMS Backup+ (backs up SMS to Google mail account):
https://play.google.com/store/apps/details?id=com.zegoggles.smssync

Torque (reads vehicle error codes via BT - Lite but there is a paid app)
https://play.google.com/store/apps/details?id=org.prowl.torquefree