LGPL License.
Download SystemEx and SystemEx.DockPanel from NuGet.
SystemEx and SystemEx.DockPanel are utility libraries containing a lot of functionality to aid development with .NET and WinForms.
Documentation for SystemEx can be found on the wiki.
Bugs should be reported through github at http://github.com/pvginkel/SystemEx/issues.
SystemEx is licensed under the LGPL 3.