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 - [tandem](https://github.com/TheRebelOfBabylon/tandem)![stars](https://img.shields.io/github/stars/TheRebelOfBabylon/tandem.svg?style=social)  - WIP: community focused relay written in Go
 - [Transpher](https://github.com/nostriphant/transpher)![stars](https://img.shields.io/github/stars/nostriphant/transpher.svg?style=social) - experimental PHP implementation with file or sqlite storage, configurable limits
 - [WoT relay](https://github.com/bitvora/wot-relay.git)![stars](https://img.shields.io/github/stars/bitvora/wot-relay.svg?style=social) - relay for every note in your web of trust 
+- [Fenrir-s](https://github.com/rushmi0/Fenrir-s)![stars](https://img.shields.io/github/stars/rushmi0/Fenrir-s.svg?style=social) - a Nostr Relay written in Kotlin/JVM21 and supports GraalVM. It uses PostgreSQL
 
 ### Relay lists 
 Websites with lists of relays and their performance/health: