Qt offers 3 licenses: Commercial, LGPL, and GPL. The LGPL option is quite business-friendly. However, recently Qt's own marketing people seem to be undermining

Qt offers 3 licenses: Commercial, LGPL, and GPL. The LGPL option is quite business-friendly. However, recently Qt's own marketing people seem to be undermining it by incorrectly suggesting that all commercial development requires a commercial license. Which is not the case. Commercial developers can use the GPL or LGPL versions as long as they comply with the license terms. Complying with LGPL is generally quite easy.