Lemmy411 - Don't know where to find what you're looking for?

Community discovery communities

!newcommunities@lemmy.world - New Communities - A place to post new communities all over Lemmy for discovery and promotion.

!communitypromo@lemmy.ca - Community Promo - Promote your favourite communities and ask about communities that you are looking for!

!trendingcommunities@lemmy.cafe - Trending Communities - Daily post by a bot highlighting trending communities.

!lemmydirectory@lemmy.dbzer0.com - Lemmy Directory - This community has bots making regular posts showcasing best content from communities in given categories to help promote them.

!findacommunity@lemmy.ml - Find a Community - A community to find other communities in any of the Lemmy instances.

Community and instance discovery tools

Lemmy Explorer -A tool to search and filter for communities or instances. You can change the software in the top left to switch to PieFed Explorer or Mbin Explorer (I believe there are plans to have a combined search in the future)

Fediverse Observer - Find a Lemmy instance near you, or view instance lists, maps, or stats. Can also be used with other Fediverse software including PieFed and Mbin.

Some Fediverse software, including Mbin, Friendica, and Mastodon, uses # tags to help with discovery on the microblogging side. Mastodon also treats community names as tags in a given post, e.g. posts in both !fediverse@lemmy.world and !fediverse@piefed.social having the # fediverse tag when propagating to there.

Communities for other questions

!lemmy@lemmy.ml - Questions about Lemmy software/development

!piefed_help@piefed.social - Questions about Piefed software/development

!nostupidquestions@lemmy.world - Questions about any topic that you need help with

!asklemmy@lemmy.world - Open-ended questions to prompt discussion

For support with a specific instance (e.g. login/account issues, requests to mod), check in your instance's local communities to see if there is a help/support community, such as !support@lemmy.world for lemmy.world

The above was compiled to try to share active communities and resources to help with discovery. Some inactive communities were excluded, but could be added if they become active again. Please leave a comment if you want to add anything, or have any suggestions!