If you are looking for a free alternative to Dnd Beyond then I recommend Dungeon Masters Vault: https://www.dungeonmastersvault.com/

They don't have an integration with Roll20 like you can get with DNDB but it works excellently for most other use-cases - if you're looking to use non SRD content you'll need to download the relevant expansion files from this spreadsheet and import them:

https://docs.google.com/spreadsheets/d/129gwuo7c2STrgnNs82KDIN3FcxKccRafOk4ykO_imak/edit#gid=1046689729

(sourced from Reddit here: https://www.reddit.com/r/dungeonmastersvault/comments/qa7eqw/all_content_orcbrew_file/)

I'm unfortunately unfamiliar with DnD tools, but there are a couple users on Soulseek who are sharing a variety of DnD tools. It looks like they all came from the same torrent (I don't have the torrent, sorry :< ).

Does anything here look useful? - https://i.ibb.co/Y30rv2y/resources.png

Not really what you are looking for but you should check out 5e tools.

if your looking for digital ways a somwhat descent way to start is by finding a digital coppy of a dnd sheet, i suggest just goolging some, and open up a sketching app and write your character and then save a copy and possibly print it. thats kind a complex way of doing things but its a start that probrably legal and free.

anyways enjoy your dnd stuff i wish i had people to play with but i dont and i dont like online too much, if you know a way to find a group please let me know.