Tulip 5 offers new features, mainly:
It adds some GUI improvements with :
the integration of the "Material design icons" (https://materialdesignicons.com) to be used as nodes glyphs,
the management of the Message log window,
the management of the Drawing defaults preferences,
the addition of a status bar and more documentation through tooltips.
The Graph API has been extended; new methods allowing multi-threaded iteration over graph nodes or edges and multi-threaded computation of nodes or edges property associated values have been added. Many algorithms have been rewritten to use these extensions giving numerous performance improvements.
Many bugs have been also fixed especially in the GUI.