For what it's worth I would also love a version that saved to local text file/relative filename.
In an ideal world, this would integrate with Hook links too -- I want that bad enough that I'm considering trying to figure out how to do it on my own.
BUT -- you may want to take a look at (Hook: https://hookproductivity.com) yourself -- it seems like exactly the kind of thing you know how to put to excellent use.
Funny you should mention Hook. When I first heard about it, I made another Alfred workflow (called Rabbit Holes) that allowed me to gather related files, notes and bookmarks under a particular subject.
It relied on unique id numbers for each subject and an index file that listed them. For instance, if I wanted to associate a pdf to the subject "Hypertext", I would:
1. Select the pdf in Finder
2. Run the workflow and perform a fuzzy search on the index file
3. Find the subject and select it.
Then, the pdf's filename would be prefixed with the code corresponding to "Hypertext"; finally, a master note for "Hypertext" would be appended with the link to that file.
(This workflow also used Dropbox though. It would have been easier if it didn't.)
If you use Alfred (with Powerpack), I'm sure we can think of something that may at least look like an alternative to Hook.
http://fuckyeahmarkdown.com by nvAlt's Brett Terpstra is very cool. It provides an API that you can use to convert almost any webpage to markdown. Then, it's only a matter of linking to that file. Again, Alfred can do this pretty easily.
As long as that other platform has some API that supports link sharing, it shouldn’t be too difficult. What would you like to use?