I've been a devoted user of Triplo since its initial release. I've tried out all the regular players in this space, but I just couldn't build a reliable workflow around them. Triplo, with its dedicated desktop app focus, filled the gaps that the other tools left behind.
The ability to use an open router to connect to dozens of other models is incredibly useful, though the generous selection of included models should be more than sufficient for most users.
The tool receives steady updates, and the founder, Felipe, is very communicative. I truly believe Triplo is the best tool I've ever purchased.
Highly recommended