I've now been involved in the Atlanta start-up scene for about 18 months, with differing levels of involved-ness. I've seen a few of these kinds of lists out there, but many seem to be targeted specifically at founders, or people on the sales side of the house. I'm a horrible networker, and generally don't enjoy that kind of thing, so here's a list for engineers:

Hypepotemous: this site is on pretty much every list, it's one of the better sources of startup news in Atlanta, if often a bit human-interesty. Also a great job board, if you're in that market. Tech404 slack channel: this is a pretty active chat room for startup-y people in Atlanta, the various rooms are hit-or-miss, but the main channel has activity on most weekdays. It's a good source for breaking type news or finding things to do. Atlanta Tech Blogs: a really good consolidation of the many many blogs around Atlanta. It's a good twitter feed to follow and pick and choose what articles look interesting. Atlanta Startup Village: another popular event in Atlanta, imagine a few hundred people watching a few dozen people talk about their ideas. Big enough crowd that the ideas are usually self-selected as pretty mature. Atlanta Tech Demo Night: same thing as ASV, but smaller, less formal, and much much earlier stage ideas. I think that makes it a bit more interesting. MLConf: A pretty cool machine learning conference that comes to Atlanta once a year. I like it because it's compressed, just one day of high quality talks in one room. Not as exhausting as huge conferences, and perhaps better quality. PyATL: I haven't actually been to this yet, but my VP of Engineering is talking at the next one (I can't go), so goto it and tell me if he does ok.

So this is in no way exhaustive; I saw that a subreddit just popped up, but haven't seen much activity there. What other websites/events do you like for startup/tech folks around Atlanta?