These are great, my preferred one is http://skimhn.com. And it's on github so I created a version that shows the latest 50 show hn. It's incredible the quantity of projects that go unnoticed. And then there are some cases like pud showing his new music project and being ignored and after some time putting a link saying he had like 400k users and didn't know what to with them and everybody went crazy up voting it. Sometimes HN is just too far from the target audience.

Thanks for sharing. Adding to the list, I built HN Showcase a while back with a similar goal:

http://www.hnshowcase.com/

Honestly thank you for posting that site. I posted a Show HN yesterday. Went to showinghn.com and didn't see my show hn on the site. Turns out I've been banned from submitting links for the past 733 days so their scraper never picked up my show hn because my submission was dead.

edit: off topic, but I was wondering if anyone knew who I could ask to have the hell ban removed on my account? (other than emailing pg)