Android email client for SMS to email gateways.

http://code.google.com/p/android-sms-email/

This is a port knocking client for Android in very early stages!

http://code.google.com/p/knock-android/

GeoBeagle is an Android application for geocaching and letterboxing.

http://code.google.com/p/geobeagle/

A simple tricorder for Android, using your phone’s real sensors to detect magnetic fields, gravity, etc. Detect buried powerful magnets! See the passing gravity wave from a distant collapsar on your phone screen!

http://code.google.com/p/tricorder/

This project’s objective is to develop a pure Java implementation of the Android’s Dalvik virtual machine.

http://code.google.com/p/android-dalvik-vm-on-java/

A collections of utilities for cleaning up your contacts.

http://code.google.com/p/android-contacts-cleanup/

Simple Calculator Project for Android.

http://code.google.com/p/android-projects/

HostMon is a simple utility to keep a track of hosts that are online using a mobile phone. It uses ping on the Android phone to check host availability. This is being developed for the Android platform and is inspired from sntop utility.

This tool is mostly helpful to administrators. One can check the status of machines. You can also ssh into a specific host. Connectbot (or any software which supports ssh intents) needs to be installed in order for ssh to work.

You can also ask hostmon to read a status xml file over the Internet. It will display the status of hosts as present in the file. This allows you to view the status of internal hosts.

HostMon is available from the Android market place. You can also download the apk file directly from the Downloads section. HostMon is Free and Open Source software licensed under GNU GPL v2.

http://code.google.com/p/msntop/

This application allows you to save bookmarks to Delicious from the Android web browser.

The current implementation simply adds the option to ‘Save to delicious’ when ‘Bookmark page’ or ‘Share page’ is selected from the browser menu. You can also view your bookmarks in the browser by clicking on the ‘Delicious Bookmarks’ icon in the application list.

http://code.google.com/p/android-delicious-bookmarks/

Ruby for Android.

http://code.google.com/p/android-ruby/