This is a table of some of the apps for the Fediverse. The list will never be complete. Apps that are in brackets are either not actively developed or only partially supported for that Fediverse software - operating system combination.

Android iOS Sailfish OS GNU/linux MacOS Windows
Mastodon & forks Tusky, Fedilab, Mastodon (App), AndStatus, Indigenous, Subway Tooter, dndkodon, (Twidere X), (Twidere), Tokodon, Moshidon Mastodon (App), (Metatext), iMast, Ivory, Mona, Toot! (Tooter), Michabo Whalebird, TheDesk, Sengi, Hyper-space, Michabo, Tokodon Whalebird, TheDesk, Mastonaut, Hyper-space, Mona, Ivory Whalebird, TheDesk, Sengi, Hyper-space
Misskey MilkTea, (Subway Tooter) MissCat Whalebird, TheDesk Whalebird, TheDesk Whalebird, TheDesk
Pleroma Fedilab, Indigenous, (Subway Tooter), (Twidere X), (Twidere) (Amaroq) Whalebird, Sengi, (Hyper-space) Whalebird, (Hyper-space) Whalebird, Sengi, (Hyper-space)
GNU Social Fedilab, AndStatus
Friendica Friendica (App), Fedilab, Relatica (Hyper-space) (Hyper-space) (Hyper-space)
diaspora* dandelior*, (Dandelion*)
Hubzilla (Nomad), (Twidere), AndStatus
WriteFreely WriteFreely (App)
Plume
Lemmy Jerboa, (Lemmur), Summit, Thunder (Mlem), (Remmel)
Pixelfed Pixelfed, PixelDroid, Fedilab, (Tusky), (Twidere X), (Twidere) Pixelfed, (Metatext) (Whalebird), (Sengi) (Whalebird) (Whalebird), (Sengi)
PeerTube TubeLab, Fedilab, Thorium, NewPipe
Funkwhale Funkwhale (App), Ultrasonic, SubStreamer SubStreamer
Mobilizon (Mobilizon (App))
BookWyrm

Further Reading