diff --git a/by-language.md b/by-language.md
index ece78a2..2c7e4c6 100644
--- a/by-language.md
+++ b/by-language.md
@@ -338,6 +338,7 @@
 
 ## Go 
 
+- [gomods/athens](https://github.com/gomods/athens) - A Go module datastore and proxy
 - [mattermost/mattermost-push-proxy](https://github.com/mattermost/mattermost-push-proxy) - 
 - [DNSCrypt/dnscrypt-proxy](https://github.com/DNSCrypt/dnscrypt-proxy) - dnscrypt-proxy 2 - A flexible DNS proxy, with support for encrypted DNS protocols.
 - [PlakarKorp/plakar](https://github.com/PlakarKorp/plakar) - plakar is a backup solution powered by Kloset and ptar
@@ -579,6 +580,7 @@
 
 ## Haskell 
 
+- [utdemir/nix-tree](https://github.com/utdemir/nix-tree) - Interactively browse dependency graphs of Nix derivations.
 - [simplex-chat/simplexmq](https://github.com/simplex-chat/simplexmq) - ⚙️ SimpleXMQ - A reference implementation of the SimpleX Messaging Protocol for simplex queues over public networks.
 - [simplex-chat/simplex-chat](https://github.com/simplex-chat/simplex-chat) - SimpleX - the first messaging network operating without user identifiers of any kind - 100% private by design! iOS, Android and desktop apps 📱!
 - [JulienMalka/artiflakery](https://github.com/JulienMalka/artiflakery) - A webserver for on the fly delivery of Nix flake artifacts