Geotools is not a an application or product - although we are pleased to interact and support the development of such projects. The LGPL license is flexible enough for Geotools to be used to create both open source and commercial applications.
If you are a first time user, the getting started page in the users guide is a good place to begin learning about geotools. Once you have read through some of the documentation and feel comfortable enough to download the software, it can be found in the Downloads section.
The content on this website may be edited by anyone! Please signup and then the  button on the bottom of each page will work, we even have a few guidelines to get you started.