Synapse-React-Client library (live demos) -GitHub repo
Many of the sites on this page utilize reusable react components found in this library. With a couple of exceptions, they also use the same simple/scalable technology stack - React (Typescript), AWS S3, and CloudFront.
...
https://signin.synapse.org/ - GitHub repo
Study Management
https://studies.mobiletoolbox.org/ - GitHub repo
Data Dissemination Portals - GitHub repo
https://arkportal.synapse.org/
...