After the publication of Calmira Blackcomb Alpha 2, its development was ceased on. Calmira Blackcomb: It is a modified version of Calmira Longhorn intended to mimic Windows 7's user interface, following the announcement of continual development of Calmira Longhorn.On, support and development started again.
On, Peter Protus, developer of Calmira Longhorn, announced that he stopped both the development of the software as well as support. In the new version, new features included a Vista style logon screen, an "X" button in the upper-right corner of windows, and LFN Support. After an extended time with no new updates (2 years) Calmira Longhorn 3.6 was released. Version 3.5 still had some bugs around dialog buttons (they are shown in French).
The source code for the Calmira shell is publicly available under GNU GPL license, thus allowing software developers to participate in the project. Because the Windows 3.x environment is virtually extinct as of 2009, additions of new features and addons to Calmira are few and far between. The Calmira shell was developed in Borland Delphi 1.0, an Object Pascal based programming environment by Borland.
The shell has a start menu, a task bar and a desktop that all function like those found in the Explorer Desktop of later 32-bit Windows operating systems. Much of the functionality of later 32-bit shells has been incorporated into the Calmira software. The shell is more than a simple cosmetic upgrade, however. A version named Calmira Longhorn is not compatible with Windows Vista, but emulates some of the visual features of that operating system. Calmira is an alternate shell available for Windows 3.1x and up that has an appearance resembling Windows 95.