I also use Zotero which I really like because you can add tags and it also automatically detects some. You can also easily generate a bibliography with the right citation when you need to write a paper.
However, even though it is open source, the Zotero developers don't seem to be keen to help people to install the server-side on their server.
I also know about WorldBrain's Memex, but they are still in heavy development and I don't like the spirit to have an extension that scans everything you browse. I want to control which page I archive.
#opensource #selfhosting #archives #research