Ultra Timer is an application that can be used to countdown the time for anything that the user wants to countdown time for.

Quick Tipper is a Tip Calculator for Android application.

JUSTones is an intuitive Ringtone and SMS Tone Manager. You can set Ringtones as well as SMS Tones (individual as well as Group tones) using the built-in ringtones or using mp3 files from your storage card. Just by using the right arrow key, you can Play/Stop an existing ringtone for any contact or group. Select multiple contacts from the main screen and set a Ringtone (or SMS Tone) for them. Contact names and Ringtone/ SMS Tone names are displayed together for any contact/group.