Definitely not as featureful as something like this, but when Delicious started to go down the pan I switched to a simple Ruby script and a Dropbox-synced data file between all my machines. Several years in, it's still working a treat! "Dropbox + simple script" seems to be a great mechanism for many apps if you don't need easy public access.
Interesting, although after reading the first bullet point ("Minimalist design (simple is beautiful)") looking at the screenshots was ... surprising ;)
Next question is one of federation (delicious, after all, works as a search engine because of multiple user input). It would be really cool to see a world where all these roll-your-own things are starting to connect.
After leaving delicious, I've been using google bookmarks(<a href="https://www.google.co.in/bookmarks/" rel="nofollow">https://www.google.co.in/bookmarks/</a>). Isn't anyone else using it ? If anyone has tried using google bookmarks, how would you compare it with pinboard.in ?
The project has not been updated for quite some time by the original author, but luckily there is a quite active fork on Github (including a public demo):
<a href="https://github.com/shaarli/Shaarli" rel="nofollow">https://github.com/shaarli/Shaarli</a>