Qt

The GUI Frame work Qt is made by Trolltech. Qt has gained widespread acceptance as the leading C++ GUI toolkit for free software on Unix. As an example, it is the basis of the popular KDE desktop environment on Linux.

If you are interested, a 30 day evaluation is available on the intranet here.

There is also Qt/Embedded. As you can guess, this is the Qt for embedded platforms. All platforms supported by Linux are also supported by Qt/Embedded. This includes CPUs based on the ARM, i386, Motorola 68000, MIPS, PowerPC chips.

features

• Platform independent widgets
• Themes
• Visual development environment
• OpenGL integration

platforms

The list below shows that Qt is available on a large number of platforms. The only one not listed (as far as I can see is the Mac OS (9 and X).

AIX - 3.2 or later.
BSDI/OS - 2.0 or later
DG/UX
Digital UNIX (OSF/1, Tru64) - 3.0 or later
FreeBSD - 2.1 or later
HP-UX - 10.20 or later
Irix - 6.x
Linux
NetBSD
OS/2 (with XFree86)
QNX
SCO UNIX
Solaris - 2.4 or later
SunOS - 4.1 or later
Windows 95
Windows 98
Windows NT - 4.0 or later
XLib on Windows

pricing

Qt has a number of pricing schemes (for details, see the web pages). I will list the appropriate numbers for developing commercial software on both Windows and UNIX (for the same developer). These prices include:

• The Qt library, with full source code
• Licensing to create commercial applications with Qt
• One year of free upgrades to all new versions of Qt
• One year of free email support
• Personal license certificate
• The complete reference documentation in both HTML and man-page format (Postscript is also available)

Important to note is that there are no royalties, run-time licenses or other additional costs. You can distribute your Qt-based programs either statically or dynamically linked without any additional charges.