diff --git a/hm_modules/development/markdown.nix b/hm_modules/development/markdown.nix
new file mode 100644
index 0000000..9f6e0d1
--- /dev/null
+++ b/hm_modules/development/markdown.nix
@@ -0,0 +1,10 @@
+{ pkgs, lib, config, ... }: {
+  home.packages = [
+    pkgs.pandoc
+    # pkgs.pandoc-drawio-filter
+    # pkgs.pandoc-imagine
+  ]
+  ++ lib.optionals config.programs.helix.enable [
+    pkgs.marksman
+  ];
+}
diff --git a/odin/hm.nix b/odin/hm.nix
index 024788a..55ae91c 100644
--- a/odin/hm.nix
+++ b/odin/hm.nix
@@ -59,6 +59,7 @@
     ../hm_modules/development/javascript.nix
     ../hm_modules/development/kubernetes.nix
     ../hm_modules/development/latex.nix
+    ../hm_modules/development/markdown.nix
     ../hm_modules/development/nix.nix
     ../hm_modules/development/python.nix
     ../hm_modules/development/rust.nix
diff --git a/thor/hm.nix b/thor/hm.nix
index 1da02cd..7a1a1e0 100644
--- a/thor/hm.nix
+++ b/thor/hm.nix
@@ -50,6 +50,7 @@
     ../hm_modules/development/javascript.nix
     ../hm_modules/development/kubernetes.nix
     ../hm_modules/development/latex.nix
+    ../hm_modules/development/markdown.nix
     ../hm_modules/development/nix.nix
     ../hm_modules/development/python.nix
     ../hm_modules/development/rust.nix