Section 1 - Email
Section 2 - Office Software
Section 3 - Calendar
Section 4 - Games
Section 5 - Music
Section 6 - CD Ripper
Section 7 - MP3 Converter
Section 8 - TV/Radio
Section 9 - Social Media / Chat
Section 10 - Image Editing
Whilst no replacement for Photoshop or GIMP, Pixlr enables you to create and enhance images.
Pixlr provides a decent set of filters and all the things you would expect from an image editor such as the ability to crop, change brightness and contrast and resize images.
Section 11 - Programming
I have tried Eclipse and Net Beans and Mono but nothing has the features that Visual Studio provides.
I was expecting not to like the online IDEs but I have to admit to being impressed with what I found.
Cloud 9 provides a way to create web projects online and edit the code direct within your browser window.
You can share the project so that there are multiple collaborators. You are able to step through and debug the code and preview the output of the project.
With Cloud 9 I found it to be a bit clunky and it took quite a while to get going to a point where I was comfortable with it.
It is still no replacement for Visual Studio but does provide an option if you decided to live your computing life totally in the cloud.
If you just want to try code out visit http://www.ideone.com. I have found this useful when answering the odd programming question on Yahoo answers where I haven't been on a machine with a compiler available.
It is by far the easiest and most intuitive to use and it provides a wide array of project types including ASP.NET, C#, VB and PHP.
There is a very good debugger.