The Briar Project is an encrypted FOSS peer-to-peer messenger app which can be used online through @torproject or offline locally through wifi or bluetooth. The "not yet official" Fediverse account for Briar is at:

➡️ @briar

Its offline mode means it can be used locally even if the internet is shut down (for example due to disasters or other reasons).

Briar's website is at briarproject.org

Mobilizon is a free open source federated events platform, designed to provide a privacy-friendly alternative to Facebook Events. You can follow at:

➡️ @mobilizon

It has just left beta testing and is now ready for use. You can find out more on official sites at:

joinmobilizon.org/en

and

mobilizon.org/en

It has been designed for activists and volunteer organisations, but anyone can use it.

Karrot is a free open source platform for sharing resources in real life (for example by sharing excess food before it goes to waste).

You can follow the project here:

@karrot

There's a flagship instance of the project at karrot.world

It's currently used mainly for food sharing, but it can be used for sharing any resource.

Mastodon

This is a brand new server run by the main developers of the project as a spin-off of mastodon.social 🐘 It is not focused on any particular niche interest - everyone is welcome as long as you follow our code of conduct!