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# Qt Editions

The Qt Professional and Enterprise Editions are the commercial versions of Qt.

Qt Open Source Edition is the non-commercial version of Qt. It is freely available for download.

You may write commercial/proprietary/non-free software only if you have purchased the Professional or Enterprise Edition. With these commercial editions, you also get technical support and upgrades. Qt for Microsoft Windows is only available as Professional and Enterprise Editions.

Professional/Enterprise Comparison Chart | Professional | Enterprise
Qt Base Modules (Tools, Kernel, Widgets, Dialogs) The platform-independent Qt GUI toolkit and utility classes | X | X
Qt Designer Visual Qt GUI builder | X | X
Iconview module Visualization of sets of pixmaps with user interaction. | X | X
Workspace module Multiple Document Interface (MDI) support | X | X
OpenGL 3D Graphics module Integration of Qt with OpenGL |  | X
Network module Platform-independent classes for sockets, TCP, FTP and asynchronous DNS lookup. |  | X
Canvas module Optimized 2D graphics area for visualization, diagrams, etc. |  | X
Table module Flexible and editable table / spreadsheet |  | X
XML module Well-formed XML parser with SAX interface and DOM Level 1. |  | X
ActiveQt extension Support for building and hosting ActiveX controls on Windows. |  | X
QMotif extension Motif co-existence and migration support. |  | X