Ovren Live Preview
I like the simplicity of this one. Most preview tools bury you in config screens and permissions, but the pitch here is just: see your product change live before it ships. That's a workflow filter every founder should want, especially when you're juggling a dozen other fires.
The real value is the speed of the loop. When you can watch a change land in real time, you catch the broken layout or the off-brand color before customers ever do. For a solo founder or a two-person team, that's the difference between shipping with confidence and shipping with fingers crossed. Every hour you don't spend debugging a live issue is an hour you can put back into the roadmap.
I'd want to know how it handles bigger codebases and whether it hooks into the tools people already use, like GitHub or Figma. But as a concept, it's the kind of small, focused utility that quietly saves hours every week. That's worth a look.