Droid Wall - Android Firewall is a front-end application for the powerful iptables Linux firewall. It allows you to restrict which applications are permitted to access your data networks.
This is the perfect solution if you don't have an unlimited data plan, or just wants to see your battery lasting longer
IP Book displays all external and internal IP addresses of your computers and Android devices.
Download and install 'IP Book' utility for Windows to update all of your computers' IP addresses in your Android device
I-Jetty is a port of the popular Jetty open-source web container to run on Android phones.Having a "personal" webserver on your phone opens up a world of possibilities, letting you run your favourite existing webapps in your mobile environment.
It also means that you can bring the contents of your mobile phone to your normal desktop browser
ZaTelnet Light is a Telnet client for Google Phone. It also emulates terminal VT100 (basically enough for working with Midnight Commander and others console programs).
A light protocol client, designed for network system administrators, end users and web designers, working with Unix/Linux/BSD systems
Show IP Widget is basically a very simple widget (4x1 in size) that displays your Android device's Internal AND External IP Address in a widget form. It detects your Internet connection (both WiFi and 3G) and displays the IP Address accordingly. If your Android device is not connected, a "Not connected" text will be displayed instead
IP track - is an application which allows you to view and track public and private Wi-Fi IP addresses, 2G, 3G connections. Signal level and connection detailes are available for viewing. The application will inform a user in case of any changes
Have you come across a situation say while your smart-phone is on Wifi and then you move around your house, it sometimes switch to other Wifi network? Ideally you want to be informed for the new network connected
ProXPN is a free, easy to use service that secures your internet connection against eavesdropping, masks your location, and allows you to access your favorite sites no matter where you live or travel to
Sophos Mobile Encryption for Android - SafeGuard Enterprise Encryption for Cloud Storage is a service which encrypts your files uploaded to Dropbox. The free Sophos Mobile Encryption app lets you access these files from your Android device.
Simply enter the pre-defined passphrase from SafeGuard Enterprise to open your files
Whois Lookup - If you enter a domain name in a WHOIS search engine, it will scour a huge database of domains and return information about the one you entered. This information typically contains the name, address, and phone number of the administrative, billing, and technical contacts of the domain name