The application Sandboxie, created by Ronan Tzur, was first released as a tool for the Internet Explorer sandbox in 2004. The functionality of the program has expanded over the years so that Windows users can use it as a sandbox on all Windows applications.
Sophos made the application available Sandboxie as freeware in 2019 and promised to release the source code of the application sometime later. So the time has come and its source code Sandboxie is now available for download. Interested users can download it from official webpage.
Sophos has also published a FAQ that answers some of the questions that existing and new users may have Sandboxie. The company states that in communication with the "members of the community" it became the Sandboxie available "through an open source program in the community".
The latest version of the application Sandboxie created by Sophos is 5.33.3 and runs on Windows 7, 8.1 and 10. All features in commercial versions Sandboxie, are also available in this version. In other words, the Sandboxie has been turned into a completely free software. The source code version is 5.40 according to the file name.
Updates, for bug fixes or improvements, from now on will be made by the community or other bodies that will use the code and continue to develop. Sophos plans to close the licensing server and the forum on June 1, 2020.
The company will maintain the official website online until then, but plans to close it in the fall of 2020. By then, the community should have fully taken over the project.