-
InfluxDB
Power Real-Time Data Analytics at Scale. Get real-time insights from all types of time series data with InfluxDB. Ingest, query, and analyze billions of data points in real-time with unbounded cardinality.
-
CouchDB
Seamless multi-master syncing database with an intuitive HTTP/JSON API, designed for reliability
-
SaaSHub
SaaSHub - Software Alternatives and Reviews. SaaSHub helps you find the best software and product alternatives
Start from the https://github.com/GoogleChrome/workbox
For other options, resource on PWA and to go deeper- https://github.com/hemanth/awesome-pwa
if you don't need your own server but a managed one https://firebase.google.com/ has an js sdk that is offline capable.
NOTE:
The number of mentions on this list indicates mentions on common posts plus user suggested alternatives.
Hence, a higher number means a more popular project.