I learned about DocStoc from Richard Byrne's blog, FreeTech4Teachers, in his post 7 Visually Appealing Ways to Post Documents Online.  What I liked the most was that it offered the ability to embed documents to websites so that people can view them without having to download them.  Of course, there is a download option for those who do want to keep a copy.  I first used DocStoc to post my classroom syllabus on my class website, and then I started to go a little crazy with embedded documents.  The downside is that, if you get as excited as I did with your embedding, your website can become cluttered and difficult to navigate, so I recommend using DocStoc sparingly.  This would be great for classroom newsletters or for publishing student writing online.  Another thing that makes DocStoc so wonderful is that you don't have to worry about the person viewing the document having the same version of software as you.

Myna is the free audio editor offered by Aviary, which also offers photo editing among other useful tools.  In the past, I have always stuck with Audacity and, while I am still a fan, I like the fact that Myna is web-based and doesn't require the user to download anything.  This would be a great tool for creating student podcasts, practicing foregin language skills, manipulating audio for student projects, etc.  Check out this website for some great tutorials to get you started.

Primo PDF is a definite must for anyone uploading files to the web.  It's an absolutely free download.  If you upload Word documents to your classroom website, you can run into issues with students who don't have Word, or who have a different version of Word.  Instead, use Primo PDF to convert your file into a PDF file.  PDF files can be read by anyone with Adobe Acrobat Reader.  PDF files are also easy to upload to DocStoc, which turns files into embeddable documents.