Tell us just ONE that is as capable and effective as Figma.
Designers don't use Figma because it's "trendy", we do it because it's the best tool for the job. The only free tool that comes even close to being good enough is PenPot, and even that is years away from being a true competitor.
There are collaboration tools in Figma that simply do not exist in the competition, so your ability to list tools that are also capable of drawing rectangles with round corners doesn't mean anything if you can't properly manage a design system that is reusable with a team of a dozen designers or more.
That could perhaps be explained by the fact that Zeplin does not have in any way the same goal as Figma.
Zeplin is not a design software, it's a presentation and sharing platform. Yes, the one-trick pony is easier to navigate than the software used to create the damn ponies, that's not much of a surprise.