+1 that I mostly use package browsers for search and end up browsing packages based on the search. ie search for json and open the six "top results" in new tabs and start comparing them.
For actual browsing of packages the tool I have gotten the most value out of is curated "awesome-lists". For example this awesome-json list. It's nice because it stretches the boundary around the packages; not only are packages for specific languages listed but similar technologies, helper tools around the concept, tutorials. You get a nice collection not just of the specific package but the ecosystem around the technology the package is related to. Would be interesting to build that curation into the package discovery experience.
