diff --git a/modules/nextcloud-integration.nix b/modules/nextcloud-integration.nix
index 262614e..109dc71 100644
--- a/modules/nextcloud-integration.nix
+++ b/modules/nextcloud-integration.nix
@@ -6,6 +6,7 @@
     # Nextcloud sync client
     nextcloud-client
     # Python bindings for Nautilus (GNOME Files) extension API.
+    # TODO: If GNOME nautilus is installed
     gnome.nautilus-python
   ];
 }
diff --git a/modules/obsidian.nix b/modules/obsidian.nix
index e7fa993..431f944 100644
--- a/modules/obsidian.nix
+++ b/modules/obsidian.nix
@@ -6,22 +6,22 @@
   #   export LD_LIBRARY_PATH=$(nix --extra-experimental-features nix-command --extra-experimental-features flakes build --print-out-paths --no-link nixpkgs#libGL)/lib
   #   obsidian
 
+  # TODO: if on wayland and scaling != 1, start obsidian with the following command.
+  # Sharp fonts.
+  #   obsidian --enable-features=UseOzonePlatform --ozone-platform=x11
+
   # This `config` is only for "stable" `nixpkgs`, not for "unstable".
-  # See nur-and-unstable.nix
+  # See nur-and-unstable.nix for how to configure "unstable" `nixpkgs`.
 #  nixpkgs.config.allowUnfreePredicate = pkg: builtins.elem (lib.getName pkg) [
 #    "obsidian"
 #  ];
 
   # TODO go back to stable nixpkgs.
-  # As of 01.01.2024, obsidian did not start on Wayland and it is using an insecure Electron version.
-  # Thus, we are currently running it from unstable.
+  # - As of 2024-01-01, obsidian did not start on Wayland
+  # - As of 2024-02-03, obsidian is using an insecure Electron version.
   users.users.yoda = {
     packages = with pkgs; [
       unstable.obsidian # Markdown notes
     ];
   };
-
-  # TODO: if on wayland and scaling != 1
-  # Sharp fonts.
-  #   obsidian --enable-features=UseOzonePlatform --ozone-platform=x11
 }
diff --git a/modules/signal-desktop.nix b/modules/signal-desktop.nix
index 201b9ed..b2689d5 100644
--- a/modules/signal-desktop.nix
+++ b/modules/signal-desktop.nix
@@ -9,8 +9,7 @@
   # Signal does also use the NIXOS_OZONE_WL variable to enable Wayland support.
   environment.sessionVariables.NIXOS_OZONE_WL = lib.mkIf (config.services.xserver.displayManager.gdm.wayland) "1";
 
-  # TODO: if on wayland and scaling != 1
-  # Sharp fonts.
+  # Sharp fonts if scaling != 1
   nixpkgs.overlays = lib.mkIf (config.services.xserver.displayManager.gdm.wayland) [
     (self: super: {
       signal-desktop = super.signal-desktop.overrideAttrs (old: {
diff --git a/modules/syncthing.nix b/modules/syncthing.nix
index df7ef96..869a293 100644
--- a/modules/syncthing.nix
+++ b/modules/syncthing.nix
@@ -35,6 +35,7 @@
   #   However, it does still not work properly: It does not detect my folders and the sync status.
   #   But this is still better than nothing ^^
 
+  # TODO: Desktop entry from postmarketOS/droidian to start syncthing user service
 
   programs.dconf.enable = true;
   home-manager.users.yoda = { osConfig, config, pkgs, ... }: {