Just what the title says. You can have your students prepare presentations, practice pronunciation, record your own lectures, and make podcasts (assuming you have a place to post) all with the free, wonderful open source software Audacity. Whoever is behind this, thank you.
In my case, our ESL department is toying with speaking homework and recorded pronunciation practice. I've heard others speak of a spoken journal. Now there is a free, and easy way to give students speaking homework. Look's like spoken word and oral histories are back.