Have you thought of using Pocket (acquired by Mozilla so we kinda know it will stick around)? I used it for a while and it does quite a decent job:
- lets you save links,
- lets you tag them by categories,
- lets you search your tags,
- all of the above for free,
- if you are ready to pay for a premium version ($5/month), it will keep a personal backup of all the articles and web pages you save.
- there's no note or summary field for inputting one's own remarks.
It all depends on how critical the note taking function is for you.
I had a similar issue a while ago, where I wanted to keep track of books/articles I read with my own notes (keeping notes makes me feel like I retain the information better). And, I solved it by making an app on Simitless. I made an Articles Database template from it, if you want to either copy or inspire from it to make your own.
For articles, I usually
- input the URL,
- a short summary of why I thought it was interesting at the time,
- assign some tags,
- assign categories and topics,
- for the full content, depending on the source, I would either copy/paste the text,
- or print the page to PDF with Chrome and upload it as a file to the app. I haven't found a solution that lets me grab the content automatically yet,
- in addition, you can import your list of articles (if you have one) and you can always export your database,
- (it is a web app, so OS independent).
For sources that I trust will remain online (Instructables, Khan Academy, etc.), I tend not to save the content as I assume it will be there later.
Full disclosure: I am part of the team that made Simitless so my opinion might be biased.