The 4.2 version of Hahlo for Mac was available to download on the developer's website when we last checked. We cannot confirm if there is a free download of this app available. The most popular version of the software is 4.2. We recommend checking the downloaded files with any free antivirus. This free Mac app was originally developed by hahlo. The software belongs to Communication Tools.
From the developer:
Hahlo is a twitter client that is optimised for the iPhone, and it also works great on a number of other devices or on your desktop in Safari, Chrome or Firefox .The goal of Hahlo has always been to cram as much of the twitter.com functionality into it as possible.
You may want to check out more Mac applications, such as Facile or BlogThing, which might be similar to Hahlo.