An office suite consisting of a word processor, spreadsheet, presentation/slideshow tool, and drawing tool. It is interoperable with Microsoft Office and can also save documents as PDF.
OpenOffice is free and open source.
A service that lets you store and share your documents and files online. If you download the Dropbox application and store your files in it, they will automatically sync with the online storage. You can organize your files into folders. You can also share files and folders.
Dropbox is not open source, but it is free.
A service that lets you upload documents and embed them in web sites. Like YouTube, Scribd is a great platform but has a lot of low quality content mixed in with the good stuff.
Scribd is not open source, but it is free.
A digital painting application with layers and multiple brushes for artists and graphic designers. It saves as jpg, png, and multiple other formats. It works particularly well with graphics tablets.
MyPaint is free and open source.
Allows you to upload, store, and share your images. You can also embed slideshows of your images into web pages. You have the option of using the standard Flickr license, or a Creative Commons license.
Flickr is not open source, but it is free.
Allows you to record your voice and what's happening on your screen from the web. They also host the screencasts. You can share and embed them, or download them as MP4 files. Screenr does not have captions, but you can export your Screenr video to YouTube and add captions there.
Screenr is not open source, but it is free.
A full-featured tool that allows you to record your voice and what's happening on the screen. Files are saved in .avi or .swf format. The Video Annotations feature allows you to add captions. CamStudio needs the Lossless Video Codec to be installed in order to work properly.
CamStudio is free and open source.
A strictly non-commercial, ad-free video hosting service. There is no maximum file-size, but you can only upload 500MG/week with the free account.
Vimeo is not open source, but the basic account is free.
Another Google Service. It hosts videos, including HD videos. It allows you to upload a .rtf document with a transcript or captions, which is necessary for your video to be accessible to people with disabilities. YouTube also gives you the option of selecting a CC-BY license instead of the standard YouTube license, so that others can remix your video. In order to upload videos longer than 15 minutes, you need to verify your account.
YouTube is not open source, and it does allow ads, but it is free.
Lets you either link to or upload videos (up to 1G) and convert them from one file format to another. Supported formats are 3gp, 3g2, asf, avi, flv, m4v, mkv, mov, mp3, mp4, mpeg, ogg, rm, wav, and wmv.
MediaConverter is not open source, but it is free.
A free web application that allows you to record sound using a microphone. You then download it as an MP3 file. Vocaroo does not have any editing features, and it doesn't host the files.
Vocaroo is not open source, but it is free.
an application that allows you to record sound using a microphone or record sound from the other applications running on your computer. It also offers flexible, powerful sound file editing. Audacity requires that you install the LAME plug-in in order to export the file as an MP3. Here is a video on how to install Audacity.
Audacity is free and open source.
A free online podcast hosting service that lets you upload your MP3 files and share them with others online. You can also make a Minicast, which allows you to display images as the audio track plays.
PodOmatic is not open source, but it is free.
Google Sites is not open source, but it is free.
An easy, intuitive online wiki platform that is commonly used by educators and students. You can embed videos and widgets. Discussion pages and comments can be enabled. Pages can be secured. There is rigorous revision history.
WikiSpaces is not open source, but it is free.
The platform created and used by the Wikimedia Foundation. It is a highly scalable and customizable platform. To install it, you (or your technical support) need to have proficiency in PHP and MySQL and also admin privileges on a server that runs them. Page creators and editors will need to learn its lightweight mark-up language, which is designed to be much easier than HTML.
MediaWiki is free and open source.
A downloadable, customizeable version of WordPress for people who want to host their own website or blog on their own server. Multiple plug-ins are available to add different kinds of functionality. It is more versatile than the web-based version of WordPress, but also more work.
WordPress is free and open source.
A note about these tools
Not all of these tools are open source, but they do output open file formats. They vary in terms of accessibility. They are certainly an imperfect set, so if you have better suggestions, please contact firstname.lastname@example.org.