Pinboard I use for pointers to things - GitHub projects that might come in handy in the future, development/design resources, particularly interesting Wikipedia articles, and other things like interviews and magazine articles.
But there's some stuff that I want to keep. I used to have a `~/box` folder on my Mac where I'd keep pictures, quotes, and screenshots of web pages I really liked. I wanted to keep them locally so that I would always have a copy of them. However, there were problems with this. By just keeping pictures as files, I couldn't always easily find where the picture came from (not without coming up with a complicated naming scheme or moving away from the simplicity of just having files in a folder). I kept quotes in plain text, so attribution was difficult for them, too — I needed to be able to capture quotes quickly, so I didn't have time to also store the URL the quote came from. And screenshots of webpages aren't exactly interactive — if I wanted to look at some HTML to see how something was done on the page, too bad. I also didn't have a pretty way to look at all the things I'd wanted to keep. All I had was a Finder window.
I know that Pinboard's premium service can archive each bookmark I send there (I've been thinking about enabling it just so I have permanent copies of interviews), but archiving an entire page is overkill for when I just want to save one image or one choice sentence from the page. Besides, if I archive the whole page, how can I indicate which image/quote I wanted to save in the first place? Long story short, Pinboard's archiving isn't quite what I want (though, like I said, I've been thinking about switching it on for backing up interviews).
Gimme Bar is basically the best of all those worlds. I can save images, videos, quotes, and site designs. I can easily see where the image/quote/etc. came from. The site gives me a purdy way of looking at them. And integration with Dropbox means I always have a local copy of everything. Gimme Bar lets me have my cake, eat it, and have my cake stored in Dropbox (I may be stretching this metaphor).
Anyway, I really, really like Gimme Bar.