absolute must have:

https://beehaw.org/post/895041

[UserScript] Lemmy Universal Link Switcher rewrites all links to Lemmy instances everywhere to your home instance! Now rewrites post/comment links! 1.2.0 Release!

guides:

• https://i.imgur.com/Hoc5dXU.png - basic infographic on “what is fediverse”

• https://lemmy.world/post/37906 - another guide

catalogues and search tools:

• https://browse.feddit.de/ - search for communities accross different lemmy instances

• https://fedi-search.com/ - frontend for google that helps adding appropriate keywords into the query to help search the lemmy instances

• https://lemmyverse.net/ - catalogue of lemmy instances and communitites

• https://kbin.social/magazines - search for communities on biggest kbin instance

leaving reddit:

• https://github.com/j0be/PowerDeleteSuite - mass delete tool

• https://redact.dev/ - mass delete your reddit posts (you have to use the tool before 3rd party apps stop working on 30/6/2023)

• https://thomashunter.name/posts/2023-06-19-how-to-delete-reddit-account-gdpr-ccpa

software:

• https://lemm.ee/c/plugins@sh.itjust.works - Lemmy Plugins & Userscripts

• https://play.google.com/store/apps/details?id=com.jerboa - android app for lemmy

other:

• https://the-federation.info/ - different fediverse instances statistics

• https://fedi.tips/ - detailed guide primarily focused on mastodon

if anyone has more links, please do contribute!