Simple online voice recorder. Share your recording via email or embed. Alternatively, you can upload a file. Recordings can be downloaded. No registration required.
Create a Live internet Radio Show Free
Limitations: allows you to record shows and episodes for a maximum of 30 minutes for each recording (it isn't a limit per day, but it refers to a single produced episode); There is no limit for uploaded podcast durations. You'll also have 20 hours worth of audio storage, which include all tracks uploaded as well as the podcasts you record.
Online audio recording and editing. Record in the browser or upload audio files. You can also edit SoundCloud files.
Limitations: I could not get this to record in Chrome on a Mac. It may work in other browsers. If you are not logged in, files are limited to 30 seconds. During the beta period, you can create an account for free, and have files up to 20 minutes long.
Application that allows students to record an audio response to a written and/or audio prompt. No signup required for instructor or student.
Limitations: The exercise cannot be edited after it is created.