/kbin has got Collections, and PieFed has got topics. You may check either out.

Socialhome with its tiled display of posts
Bonfire, which is modular, and will be available in many flavours (for Open Science, organisations or simply a social network)
Mobilizon - events and groups.
Gancio - events, published anonymously. Instance can be followed from Fediverse as an account.
Bookwyrm for books
Postmarks - a federated bookmarking website
Funkwhale - for uploading and listening to music
Castopod - Wordpress but for podcasting?
Misskey and its forks - more than Twitter emulation - includes emoji reactions and animated text!

You could peek at two opposing views on the same article, for example.

Post-truth as a service.

Wikipedia is not a Big Tech nor a commercial enterprise prone to enshittification nor it profits from surveillance capitalism. We don't need another, competing, universal source of enclopedical information. Wikipedia, on contrary to X, Reddit, Facebook, etc. is not going anywhere. Any self-styled Wikipedia alternative ended up dead, thematic, or biased by design.

However there are many thematical and fan wikis hosted on Fandom, which itself is a commercial company and there were already some contoversies concerning it. Wikis on Fandom are very resource-intensive compared to Wikipedia or independent thematical wikis.

Ability to edit at several wikis from the same account without being tied to Fandom could be one of things that Ibis offers and could benefit independent wiki sites.

And of course, MediaWiki is free software and federation could be added as a functionality.

Its federation. Even to that point, than I can reply to you when not using Lemmy at all. I am writing this from /kbin.

For example, Threads supports audio posts, a feature not currently supported within ActivityPub(...)

Laughs in Funkwhale, Castopod, and even any ActivityPub platform implementing an Audio object type

Wired checked no Meta claim against reality.

Internet Exploring

Authorised Fetch existed long before Instagram Threads. When it is turned on, an instance will require any other server to sign their request to fetch any post. This prevents "leaking" of posts via ActivityPub to blocked instances.

This setting is turned off by default, because some software are incompatible with it (like /kbin, Pixelfed before June 2023, maybe Lemmy too), because it makes server load higher, and it may make some replies missing (at least on microblogging side).

This is not an exhaustive list. For example, Instagram Threads profiles are available from kbin.social, which is not listed here, though.

KDE Plasma is the OS

What chmod step?

When I clicked on new app image, the OS told me, that program /name of app/ will be launched, I clicked "Continue" and it runs! No meddling with "chmod" or anything like that.

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