Grades2Go Mobile for Android is a companion app for Grades2Go Desktop, the first data platform designed specifically for teachers. Full info is available at mindsparkinc.com.

Much more than a gradebook, Grades2Go has extensive commenting, journaling, PDF reporting, and automated communication capabilities. With teachers under pressure for more accountability and results, Grades2Go is an indispensable professional tool.

Apn4Apps disables mobile data when the screen is off and enables it when the selected application starts to run on the foreground

Battery widget showing exact battery level, which enables quick system's settings toggle (wifi, bt, gps, mobile data, airplane mode, ringer mode).

With Multi Mount SD-card you can access to your SD-card from your
computer and PC simultaneous.

Always carrying your charger around? You don't need to!

JuiceDefender intelligently and transparently manages for you mobile connectivity and other battery-sensitive components, greatly improving battery life.

Quick Settings is a highly customizable all-in-one settings applications for Android

Paperdroid is an offline article reading Android app that integrates with the excellent service Read It Later and/or Google Reader.
Found an interesting but long article while surfing in a costly internet point? Skimming hastily through your feeds for worthy posts? Just save the page to Read It Later (via bookmarklet, the Firefox extension etc.) or star it in Google Reader and have Paperdroid automatically download it to your trusty Android phone for offline reading pleasure - later.