Avogadro v2#
Avogadro 2 is currently in beta. It was re-written from scratch to address a number of issues with the Avogadro v1 codebase.
Major concerns in Avogadro 1.0 focused on stability (i.e., crashes) and speed, particularly with molecules or systems over a few hundred atoms. Avogadro v2 was designed for fast modern rendering and improved stability. It is a platform to make it easy to build the next generation of molecular and materials visualization and editing tools.