- The Twitter module for Drupal
- Another Drupal module called JUItter (http://juitter.com/)
- The official Twitter widget
- Tweet by seaofclouds (http://tweet.seaofclouds.com/)
The last was definitely not least, I can tell you that.
The Twitter module was terrible, much too complicated for this simple task. Besides there is virtually no documentation. A shame for a module of this size! Furthermore the recommended beta didn't really work. After uninstalling (and removing the created views!) I got a long way with the previous stable version, but it seems that twitter stopped allowing old API calls and now only accepts calls made using OAuth.
JUItter seems nice and it is client based (a pro for social media). Above all, it has a ready to use Drupal module, or so they claim. After downloading the zip it contained only 3 files and no traces of any Drupal module. Now something might just be messed up here temporarily, but I went on right away.
Tweet by seaofclouds works right away. No hassle whatsoever. It is client based, so no trouble with caching and all that. Use jquery and their .js file. The add the following code to a Drupal block:
Note that I put the creation of the div in javscript, using a document.write. This is because my Drupal configuration does not allow me to post divs in a block's source code.
So once again, Tweet is the solution.