Android is a very popular mobile operating system, especially with low cost tablets like the Amazon Kindle Fire and Nook Tablet available for less than $250. You can view, edit, and create Office documents with the six applications shown in this image gallery.

Please check out my ZDNet Mobile Gadgeteer post where you can read all the details about each app and see a comparison chart of some advanced features.

The main start screen in Documents To Go.

Browsing files from Google Docs.

Working with a spreadsheet in DTG.

Note the bottom menu options in Sheet To Go.

Formatting selections in DTG.

Tap and hold options in Excel.

Insert options in Sheet To Go.

There are several view options in DTG.

When you work within a cell the bottom menu options change.

Some of the available functions.

Working in Excel with DTG.

Font formatting options in Sheet To Go.

Word To Go in DTG

Word in portrait with menu options shown

Word To Go view options in DTG.

Formatting options in Word To Go.

There are several detailed alignment options in DTG.

You can create custom Word documents.

There are a few insertion options in DTG.

More options available in Word To Go.

File options in DTG.

You have three choices when you choose to create a new document.

Working with a new PowerPoint file in DTG.

Insert options in Slideshow To Go.

There are several view options in the PowerPoint module of DTG.

You can transfer files via WiFi to local connected desktops.

This is the start screen for the Kingsoft Office application.

The main toolbar appears at the top of the page and can be toggled on and off.

There is limited support for remote storage, including Box.net.

These are the options that appear when you choose to create a new document.

Viewing a Word document.

Notice the font options shown in the top toolbar.

The top toolbar now shows the alignment options available.

The software works in both portrait and landscape orientations.

You can creat spreadsheets in Kingsoft too.

The top toolbar can be toggled off so you can view more of your spreadsheet.

You can work within specific cells, but unfortunately everything is manual in Kingsoft.

The main launch screen in OfficeSuite is a file browser.

The three main remote server solutions are supported by OfficeSuite.

Excel in landscape in OfficeSuite.

There are several function categories to choose from as you edit cells.

Note the bottom menu options that appear when you press the menu button.

Surprisingly, you can actually create and edit charts in OfficeSuite.

There are plenty of font options available too.

There are many font color options to choose from.

There are several chart options to choose from.

The newly created chart is viewable and can be modified.

Working with spreadsheets in OfficeSuite.

Working with Word documents in portrait orientation.

Available format options in portrait orientation.

Font color options to choose from.

There are several number and bullet options available.

There are specific, detailed alignment settings available.

There are several different kinds of data you can insert into your Word document.

Creating a new document using the upper toolbar from the home screen.

There are several templates available when you choose to create a PowerPoint presentation.

You can work with the template in OfficeSuite to create a presentation.

There are a few options available in the presentation module.

You can view your slideshow in full screen mode.

You can control your presentation with these minimal settings.

The Polaris Office home screen is simply a file explorer.

There are some basic available in the spreadsheet module.

Working with a spreadsheet in Polaris Office.

There is just a simple toolbar at the bottom when a Word document is opened up.

The more options menu doesn't have many choices.

Working with a PowerPoint slideshow in Polaris Office.

The Quickoffice launcher gives you access to a file browser, new document creation selector, and remote server setup options.

Quickoffice supports the largest number of remote cloud servers as you can see in this screenshot.

Viewing Google Docs in Quickoffice.

Quickword options within Quickoffice.

There are three formats to choose from when you select to create a new document.

Here you can see the layout of the program with nearly a full screen available in the Quickword module and menu options available at the bottom of the display.

There are detailed paragraph options in Quickword.

There are also several font options available within Quickword.

Some more menu options in the software.

You can insert images into your document as well.

You can change the view to see what your document will look like when printed.

There is one last information menu over on the far right.

Viewing a Word document in landscape orientation.

Here you can see even the main launch screen is in landscape when you rotate your device.

There are three new spreadsheet options available too.

Tap on the green function button to choose from available functions.

You can work with spreadsheets within Quickoffice.

There are plenty of specific options available within Quickoffice as you can see in the bottom menu here.

Alignment of cells is quick and easy with the tap and drag option.

Border options are easy and a viewer shows you just what they will look like.

You can manage cell heights and widths here.

There are insertion and deletion options available.

You can select multiple cells and then decide what to do with them too.

There are three new PowerPoint options in Quickoffice.

Here is what happens as you create a new slideshow in Quickoffice.

Paragraph alignment is easy in the slideshow editor as well.

Picture insertion is supported in Quickoffice.

After you make some changes and edit your new creation you can view it as a slideshow.

You can select a slide template to start with.

There are some text selection options as well.

Detailed and rather extensive slideshows can be created in Quickoffice.

The ThinkFree Mobile application suffered a major issue after the latest update where it no longer fills the display.