diff --git a/nixos/packages/default.pkgs.nix b/nixos/packages/default.pkgs.nix
index 3ff565d..9abd8f9 100644
--- a/nixos/packages/default.pkgs.nix
+++ b/nixos/packages/default.pkgs.nix
@@ -145,6 +145,11 @@ with pkgs;
   # Office.
   sc-im
 
+  # Lab tools.
+  deprekages.rfe-fwupdate
+  deprekages.rfe-touch
+  deprekages.rfe-signal
+
   # For editors.
   fish
   lazygit
diff --git a/nixos/packages/offline.pkgs.nix b/nixos/packages/offline.pkgs.nix
index 9cac4f2..bf62f70 100644
--- a/nixos/packages/offline.pkgs.nix
+++ b/nixos/packages/offline.pkgs.nix
@@ -33,6 +33,7 @@ with pkgs;
   python3
   cfr
   procyon
+  mono
 
   # Build systems.
   cmake
@@ -85,7 +86,6 @@ with pkgs;
   if pkgs.stdenv.isDarwin then
     [
 
-
     ]
   else
     [ ]
diff --git a/packages/default.nix b/packages/default.nix
index f0d01cc..abd4e7c 100644
--- a/packages/default.nix
+++ b/packages/default.nix
@@ -5,7 +5,7 @@
   flake-utils,
   deprekages,
   nixpkgs,
-  esp-dev
+  esp-dev,
 }:
 
 flake-utils.lib.eachDefaultSystem (
@@ -72,6 +72,11 @@ flake-utils.lib.eachDefaultSystem (
       vja = callPackage ./vja.nix { };
       gimgtools = callPackage ./gimgtools.nix { };
 
+      # rf explorer
+      rfe-fwupdate = callPackage ./rfe-fwupdate.nix { };
+      rfe-touch = callPackage ./rfe-touch.nix { };
+      rfe-signal = callPackage ./rfe-signal.nix { };
+
       # libraries
       libnfc-nci = callPackage ./libnfc-nci { };
       ws-server = callPackage ./ws-server { };
@@ -120,12 +125,12 @@ flake-utils.lib.eachDefaultSystem (
       esp-env = esp-dev.${system}.esp-idf-full;
 
       # xonsh and xontribs
-      xontrib-whole-word-jumping = callPackage ./xontrib-whole-word-jumping.nix {};
-      xontrib-term-integrations = callPackage ./xontrib-term-integrations.nix {};
-      xontrib-prompt-starship = callPackage ./xontrib-prompt-starship.nix {};
-      xontrib-prompt-bar = callPackage ./xontrib-prompt-bar.nix {};
-      xontrib-termcolors = callPackage ./xontrib-termcolors.nix {};
-      xontrib-sh = callPackage ./xontrib-sh.nix {};
+      xontrib-whole-word-jumping = callPackage ./xontrib-whole-word-jumping.nix { };
+      xontrib-term-integrations = callPackage ./xontrib-term-integrations.nix { };
+      xontrib-prompt-starship = callPackage ./xontrib-prompt-starship.nix { };
+      xontrib-prompt-bar = callPackage ./xontrib-prompt-bar.nix { };
+      xontrib-termcolors = callPackage ./xontrib-termcolors.nix { };
+      xontrib-sh = callPackage ./xontrib-sh.nix { };
 
       xonsh-with-xontribs = pkgs.xonsh.override {
         extraPackages = pythonPackages: [
diff --git a/packages/rfe-fwupdate.nix b/packages/rfe-fwupdate.nix
new file mode 100644
index 0000000..3a764b1
--- /dev/null
+++ b/packages/rfe-fwupdate.nix
@@ -0,0 +1,28 @@
+{
+  stdenv,
+  fetchzip,
+  mono,
+}:
+stdenv.mkDerivation (finalAttrs: {
+  pname = "rfe-fwuploader";
+  version = "latest";
+
+  src = fetchzip {
+    url = "https://j3.rf-explorer.com/download/sw/fw/RFExplorer_UploaderLinux.zip";
+    hash = "sha256-eHDMQvL0L4JmEc+q4qeKV2i1EMXdE3G1JX2Jhuctg6o=";
+
+    stripRoot = false;
+  };
+
+  buildInputs = [ mono ];
+
+  installPhase = ''
+    mkdir -p "$out/bin"
+    cp $src/RFEUploaderLinux.exe $out/bin/.rfe-fwupdate-mono
+
+    echo "#/usr/bin/env sh"
+    echo "${mono}/bin/mono $out/bin/.rfe-fwupdate-mono" >> $out/bin/rfe-fwupdate
+    chmod +x $out/bin/rfe-fwupdate
+  '';
+
+})
diff --git a/packages/rfe-signal.nix b/packages/rfe-signal.nix
new file mode 100644
index 0000000..fcd0547
--- /dev/null
+++ b/packages/rfe-signal.nix
@@ -0,0 +1,36 @@
+{
+  lib,
+  stdenv,
+  fetchzip,
+  mono,
+  gtk2,
+}:
+stdenv.mkDerivation (finalAttrs: {
+  pname = "rfe-signal";
+  version = "2_5_2105_2";
+
+  src = fetchzip {
+    url = "https://j3.rf-explorer.com/download/sw/linux/RFExplorerGeneratorLinux_v${finalAttrs.version}.zip";
+    hash = "sha256-bvTH3EzFvizPrb5fv8LzIin45KkmASMRh/rk0BP+yIg=";
+
+    stripRoot = false;
+  };
+
+  buildInputs = [
+    mono
+    gtk2
+  ];
+
+  installPhase = ''
+    mkdir -p "$out/bin"
+    cp $src/RFExplorerGeneratorLinux_v${finalAttrs.version}.exe $out/bin/.rfe-touch-mono
+
+    OUTFILE="$out/bin/${finalAttrs.pname}"
+
+    echo "#/usr/bin/env sh" > $OUTFILE
+    echo "env LD_LIBRARY_PATH=\"${lib.makeLibraryPath finalAttrs.buildInputs}\" ${mono}/bin/mono $out/bin/.rfe-touch-mono" >> $OUTFILE
+
+    chmod +x $OUTFILE
+  '';
+
+})
diff --git a/packages/rfe-touch.nix b/packages/rfe-touch.nix
new file mode 100644
index 0000000..0b5b224
--- /dev/null
+++ b/packages/rfe-touch.nix
@@ -0,0 +1,36 @@
+{
+  lib,
+  stdenv,
+  fetchzip,
+  mono,
+  gtk2,
+}:
+stdenv.mkDerivation (finalAttrs: {
+  pname = "rfe-touch";
+  version = "2.7.2206.7";
+
+  src = fetchzip {
+    url = "https://j3.rf-explorer.com/download/sw/linux/RFETouchLinux_${finalAttrs.version}.zip";
+    hash = "sha256-0/O12nlmAsN4tly574ZNtFSMvhghR/VMU2h6SwzXS/k=";
+
+    stripRoot = false;
+  };
+
+  buildInputs = [
+    mono
+    gtk2
+  ];
+
+  installPhase = ''
+    mkdir -p "$out/bin"
+    cp $src/RFETouchLinux_${finalAttrs.version}.exe $out/bin/.rfe-touch-mono
+
+    OUTFILE="$out/bin/${finalAttrs.pname}"
+
+    echo "#/usr/bin/env sh" > $OUTFILE
+    echo "env LD_LIBRARY_PATH=\"${lib.makeLibraryPath finalAttrs.buildInputs}\" ${mono}/bin/mono $out/bin/.rfe-touch-mono" >> $OUTFILE
+
+    chmod +x $OUTFILE
+  '';
+
+})