HN is a gem of an online community for hacking and startup related news/talk.
What other communities, similar ot HN, but can be on any subject, do you follow?
It's not focused on any subject; maybe a little inclined towards humanities/literature, but by no means limited to it. I sometimes see the same articles discussed there and on HN.
I'm following (and created) http://www.trejdify.com/ which is similar to HN, but it's only economical resources. The current site is a beta, but my plan is to finish the new version soon. The new version will also include a "tools" section with different tools one can use to improve your economical decisions
Feedback: Great idea! Design can use some help. I would follow a format more similar to hn news (minimal design). Also, if you are going to advertise, put it at the page footer. No one will enjoy looking at the ads on the side of the page. Once again, great idea. If you need css help, email me, I'd love to contribute.
Mostly IRC channels like #openbox, #debian and #debian-next on OFTC and #vim on freenode.
http://planet.filibeto.org/
http://planet.debian.org/
And as I've mentioned in a previous comment:
/r/linux
/r/raspberry_pi
/r/commandline
/r/perl
/r/bash
/r/debian (low volume of traffic/posters)
/r/solaris (very low volume of traffic/posters)
/r/openbox (very low volume of traffic/posters)
...and of course raspberrypi.org/forum