In addition: "It lets us open a dialogue with companies that earn money with products built with an open-source version of Qt. Insisting on an account, the company says, will encourage users to "help improve Qt in one form or another" since the bug reporting, code reviews and forums are only accessible with an account. The rationale, spelled out in this document (PDF), is that the company wants to steer more users towards commercial licences while also doing all it can to persuade open-source users to contribute rather than merely enjoy the software for free. This is a full commercial licence including development tools, but deployment licences are extra. This free tool was originally produced by Qt Project Hosting. The most popular versions of the program 5.1, 4.7 and 4.0. We cannot confirm if there is a free download of this software available. A new licence aimed at "start-ups and small businesses" has been introduced, costing $499 per annum. Qt Creator 5.13.0 was available to download from the developers website when we last checked.Offline installer and Long Term Support (LTS) releases will only be available to commercial licensees.Installation of Qt binaries will require a Qt account.Petteri Holländer, senior veep of product management, has posted about the changes. As with many businesses based on open-source projects, it sounds as if the company is experimenting to find the right balance between the open-source ethos and what is best for business. It has several commercial and open-source licences: LGP元, GPL2 and GP元. It is suitable for embedded, mobile and desktop applications, and the company provides design tools (with support for the QML language for defining a user interface) and an IDE that runs on Windows, Linux and macOS. ![]() Qt is a cross-platform C++ framework with official bindings for Python as well as community support for many other languages. The Qt Group is making changes to the terms under which its popular open-source Qt library is available to encourage more commercial licensees and a higher level of contribution from users.
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