PouchWiki
A Wiki that runs inside the browser. All the pages you created are stored in the browser and synced to a server to be available on different devices.

https://pouch.wiki
Industry
Personal productivity
Tasks
Running a wiki from the browser that also works while being offline.
Challenges
Saving the wiki pages in browser storage and also rendering them in the browser. Syncing the pages with a server.
Products
Angular, CouchDB, PouchDB