Gecode 4.4.0 was available to download from the developer's website when we last checked. We cannot confirm if there is a free download of this software available. The most popular versions among the software users are 4.4, 4.3 and 4.2. The program lies within Development Tools, more precisely IDE. We recommend checking the downloaded files with any free antivirus. This free program is an intellectual property of The Gecode Team.
From the developer:
Gecode is a toolkit for developing constraint-based systems and applications. Gecode provides a constraint solver with state-of-the-art performance while being modular and extensible. It supports the programming of new constraints, branching strategies, and search engines.
You may want to check out more software, such as Greatis Form Designer.Net, ecGraph or TinyOS, which might be related to Gecode.