One category of apps I think would be interesting is caching SaaS data locally to make for fast search. e.g. Intercom is painfully slow, I want an extension that caches recent Intercom data for fast search and messaging.
https://chrome.google.com/webstore/detail/sqanything/naejbcf...
Good luck with the new thing!
We are free during the developer preview/beta and plan to have a really generous hobby tier. We are rolling our own Stripe integration down the road for enterprise users!
Another route is to use something like http://alasql.org/ to cache data in localstorage so you can query it instantly. Would a search UX be better, or a text box to directly write SQL over your data?