Spark, a new application for Mac OS X I had the chance to beta test, was finally released tonight. Here is the official (and cute!) website.
Spark is a very lightweight notes taking / to-do list app, which you could decide to either run in the dock or in the menubar. The interface is very nice and straightforward: you can add tasks, attach notes to them and organize tasks in bigger projects. Another great features is the iCal syncing: everytime a Spark task changes, so it does in iCal. Cool.
Spark is a freeware, it has a clean and well-designed UI and it could become the ultimate solution for those who are looking for a simple, uncluttered to-do manager app for Mac.