Twitter is a miniblog service. Posts are limited to 140 characters, which is the same limit for text messages. This is not by chance; Twitter allows status updates through its website, the Twitter IM buddy, and text messages from your mobile phone. twitterfeed adds automatic RSS posts to Twitter.
tw.rb
Smaller than tw.py, it uses JSON to post and view statuses. Requires gems, highline. and JSON.
tw.py
A console twitter application for updating and viewing statuses.
tw.sh
A bash script to update the status.
stw.sh uses a shh tunnel to update the status.
Jaiku
Jaiku works like Twitter. The API is similiar, except Jaiku requires an API key (stored in jaiku.yaml), and may limit the number of API calls per day.
Pownce
Waiting on an API...
Plurk
Waiting on an API...
