[1] It is an open-source project maintained by SAP SE available under the Apache 2.0 license and open to contributions.

[1] The team that started the project in 2009, that eventually lead to OpenUI5 was tasked with creating a new user interface (UI) for SAP applications.

Objectives included a framework that was flexible, extensible, modern, and would provide a consistent look and feel across SAP applications.

[3] The library was open sourced in December 2013, after being used in production at SAP for several years.

[2] All OpenUI5 components are completely free, and there are no paid "premium" or "commercial" widgets: OpenUI5 is best described as a one-stop-shop toolkit.