>Feel Free To Copy, update, and expand this.

Mastodon (MicroBlogging)
“Your home feed should be filled with what matters to you most, not what a corporation thinks you should see. Radically different social media, back in the hands of the people.”

Equestria.Social - Updated 7/1/2023
>“EQS is a Mastodon instance/server for fans of little ponies, that has been online since May 8th, 2017. It is part of the fediverse, a large decentralized social network.”

-Rules: equestria.social/about
13 Rules, Cannot Be Easily Summarized
-Admin: C_Chell@equestria.social
>“Administrator of http://www.canterlotcomics.com ( @CanterlotComics ), http://www.c-chell.fr and this instance.”

Pony.Social - Updated 7/1/2023
>“Ponies on the Fediverse, Ponies on the Timeline, Ponies Everywhere. No horsing around. For nerds, LGBTQ+ or just people looking for a comfy place to call a home in this wild internet.”

-Rules: pony.social/about
>9 rules. Cannot Be Easily Summarized
-Admin: cult@pony.social
>“my opinions are those of your lawyers, I am not an employer, and most importantly I am not *YOUR* employer. I am forklift certified#nixos #bi :bisper: 🇺🇦”

Pone.Social Updated 7/1/2023
>“Pone.Social is a Mastodon-enabled social network for bronies, pegasisters, and all the rest of you horsefucker degenerates.“

-Rules: https://pone.social/about
 5 rules. Pony First. More topics than pony allowed. Not a Safe Space. No Spam or Server Abuse. No Illegal Content.
-Admin: corpubro@pone.social
>?“✶ https://twifag.com ✶ Come to https://marefair.org ✶ Admin https://Twibooru.org, https://Pone.Social, https://smutty.horse, https://mlp.chat, & https://Pony.Tube ✶ Editor for https://Horse-News.org ✶ twifag.eth”
Pon.ee - Private Updated 7/1/2023
>"A general-purpose server for chill peeps who find talking horses kinda neat. No language restrictions, but we mostly use 🇬🇧, occasionally 🇨🇿/🇸🇰. Registrations open to friends of current members."

-Rules: https://pon.ee/about
7 rules. Hard to Summarize Here.
-Admin: a10@pon.ee
“I like #MLP, #TOH, liberal democracy, and other gay stuff.
IoT SW dev by profession. ♂️, :heart_pan:, 🇨🇿, buttons disgust me.”

Mastodon.is.a.Horse Updated 7/1/2023
“On the internet, nobody knows you're a horse. Unless you tell them, I guess.”

-Rules: https://mastodon.is-a.horse/about
>6 rules. Be excellent. No illegal content. Tag NSFW. Ask before adding a bot. No “Not Safe For Life.” Not a free speech instance.
-Admin: https://mastodon.is-a.horse/@Lapsus
“On the internet, nobody knows you're a horse.
”
Pleroma/Akkoma (MicroBlogging)
>“Free and open communication for everyone. Pleroma is social networking software compatible with other Fediverse software such as Misskey, Pixelfed, Mastodon and many others.”

Our-Town.Social Updated 7/1/2023
“Welcome to our town. The first and currently only pony related Akkoma based fediverse instance with open registration.”

-Rules: https://our-town.social/about
>8 rules. Hard To Summarize. 9th rule is just reserving the right to change the rules. Abides by the GDPR
-Admin: interru@our-town.social
>“Software developer, Linux user, Brony (obviously) #nobot
Makes cute horse noises about:
#pony, #mlp, #FLOSS, #linux, #technology,
sometimes #photography and other various stuff”

PeerTube (Video)
"PeerTube allows you to create your own video platform, in complete independence."

Pony.Tube  Updated 7/1/2023
>“We are a video sharing site that seeks to provide a haven for pony content that you may have issues uploading on larger sites like YouTube or you fear may be taken down for any reason. We seek to be entirely free of cost and free of ads.”

-Rules: https://pony.tube/about/instance
>3-ish rules. Upload only Pony-Related Content, Tag NSFW videos, No Violence against IRL animals.
-Admin: Corpulent Brony (Also runs Pone.Social)
>“Hello frens. I hope you're having a good time. If you need to contact me, the best way is to to use the "Contact administrator" button in the About section of the site.”

Pixelfed(Image Sharing)
"A fresh take on photo sharing. Get inspired with beautiful photos captured by people around the world."

Pony.Gallery - Dead
Seems to be dead.