Good news for all developers! QT will be available under the LGPL starting with version 4.5. The GNU Lesser General Public License (LGPL) is a free software license published by the Free Software Foundation. The LGPL places copyleft restrictions on the program itself but does not apply these restrictions to other software that merely links with the program. There are, however, certain other restrictions on this software. The LGPL is primarily used for software libraries, although it is also used by some stand-alone applications, most notably Mozilla and OpenOffice.org.
This option could increase Qt usage and adoption. You may see more cross platform commercial application on the Linux desktop. This is huge news for cross-platform developers.
OpenGL (Open Graphics Library) is a standard specification defining a cross-language cross-platform API for writing applications that produce 2D and 3D computer graphics. The interface consists of over 250 different function calls which can be used to draw complex three-dimensional scenes from simple primitives. OpenGL was developed by Silicon Graphics Inc. (SGI) in 1992 and is widely used in CAD, virtual reality, scientific visualization, information visualization, and flight simulation
Some license agreements grant considerably more rights than most EULAs provide. A free software license grants the right to modify and redistribute the licensed software for any purpose. Mozilla Corporation enforces trademarks and claims the right to deny the use of the name “Firefox” and other trademarks to unofficial builds such as Ubuntu’s Firefox. Now you need to accept EULA before using Firefox under Ubuntu.