TwitterFone
TwitterFone is a free service (like Twitsay) that lets you record voice messages and have them posted to your Twitter stream. To use TwitterFone, you must verify your phone number and Twitter account, and then you will be given a local phone number to call to leave your messages. (U.S., UK and Ireland, more to come)
TwitSay
Twitsay is an app that lets you leave voice messages on Twitter. To use TwitSay, you login at the site, call your regional number, and leave a message. The message will be posted to your Twitter stream. (Germany & Austria only) via SheGeeks
Twittergrams
A Twittergram is a voice version of Twitter. You record a brief audio clip (200K max), and Twittergram puts it on a server and creates a Twitter post that links to it. Twittergrams can be posted to your own personal Twitter account as well as to a public collection of Twittergrams. A TwitterGram has a title and a small MP3 file. The title explains the gram, it must be no longer than 75 characters, to allow room for the URL of the MP3, which is about 50 characters. The MP3 file may be no larger than 200K, although they won’t reject MP3s that are just a bit bigger than 200K, they’re not saying how much bigger. Also, you may not post more than one TwitterGram every ten minutes. This limit is not strictly enforced, but it will be, at some point, to help keep down TwitterGramSpam.
