See a working example here: LINK
This is the "public open-source" variant of Chainhawk, an application I've been developing, designed to enable users to create, collect and maintain lists of addresses, coupled with metadata profiles including names, social media handles and more!
What's more, you can maintain a list of important transactions - this list would also use the metadata that is collected in the lists of a user.
The key feature of Chainhawk: There is NO central database! 👀
That's right - Chainhawk is an interface, where you can import and export your address and transaction lists, as either CSV or JSON, in a standardised format - perfect for folks who wish to share or distribute lists for others to import or collaborate on.
This shit is built at my own leisure, and you're to have no expectation of any sort - not of reliability, feature upgrades or updates, continued support or anything else. Enjoy and use responsibly!