While the built-in browser on your Android device lets you bookmark interesting and useful links, you'd usually want to save them on a Web-based service rather than storing them on the mobile device.

There are two ways to turn your Android phone into a mobile wireless hotspot: you can either buy a device running Android 2.2 Froyo, or you can root your current Android phone and install the Wireless Tether application.

Checking whether a specific Web server is up and running is as easy as issuing the ping command in the terminal, but if you are looking for a more versatile tool that you can use while on the move, try httpmon for Android

When it comes to note-taking apps for Android, you can't go wrong with OI Notepad. At first sight, OI Notepad looks pretty bare-bones, but it does offer a few useful features.

Is the popularity of phone app stores an opportunity for free and open source software?

Tools like Rachota can help you to keep track of time when you are working on your computer, but it's not much use when you are working on the move. In this case, you need the TimeTracker tool, a no-frills time tracking app for Android.

There are dozens of tasks managers on the Android Market, but SimpleDo rules them all. Why? Because it combines simplicity and versatility.

Tomboy is a handy little note-taking tool that sports a few nifty features, including the ability to upload notes to a remote server and sync them between different machines. And now you can put your Tomboy notes on an Android device courtesy of Tomdroid.

Say you need to share documents stored on your Android device with several users. Or perhaps you want to download photos and upload music files without fiddling with USB or Bluetooth connections. Install and run the SwiFTP FTP server on the Android device, and you (as well as other users) can access files from any machine via the FTP protocol.

Thanks to a Twitter-compatible API, many closed source Twitter clients for the Android platform will happily work with Identi.ca. But why settle for a closed source app if you can install the excellent open source Mustard client?