I don't usually pay for utilities, but this has been nice since I bought it a month ago.
Mainly for the function to send to my kindle for less eye strain.
(Shameless Plug): I am developing a sharable bookmarking app that allows sharing of bookmarks:
Periodically, (meaning 'when I remember') I save my current browser bookmarks as a .html file in a specific 'bookmarks' folder in my 'Documents' directory. These files get named 'bookmarks_YYMMDD', thus they are automatically sorted by date.
Being .html files, they are automatically also plain text files, and can be searched easily using standard tools like 'grep'.
What are you guys saving that's so important to you?
Searchable, accessible from anywhere, and I own it, no worries about service shutting down.
Also I use this instance of WordPress like a scrapbook and dump all kind of information in there. While reading books on phone or iPad, I can add quotes from them. Android app is pretty good for this. Also I take photo notes for example while shopping for something in a physical store, I can add pictures of them to a post etc and then review later. Once a month or so, I download backup.