I’ve used Atlantis v1.0.0 (free version called “Nova” !) since 2005 and I use the payed version since 2013 and the v1.6.
Very very good program : lightweight, use a low amount of memory and CPU (for old computers) but with a very fast loading.
Many useful features.
For people who want to buy license later, it is frequently updated (real updates, with new features!). Last update on april 2019.
APPRECIABLE : pour les utilisateurs francophones, une vraie documentation existe en “bon français” et est très complète en plus…