diff --git a/default.config.yml b/default.config.yml
index af145cb..45792bd 100644
--- a/default.config.yml
+++ b/default.config.yml
@@ -75,5 +75,13 @@ mas_password: ""
 
 osx_script: "~/.osx --no-restart"
 
+# Install packages from other package managers.
+# Note: You are responsible for making sure the required package managers are
+# installed, eg. through homebrew.
+composer_packages: []
+gem_packages: []
+npm_packages: []
+pip_packages: []
+
 # Glob pattern to ansible task files to run after all other tasks are finished.
 post_provision_tasks: []
diff --git a/main.yml b/main.yml
index 1998870..3d25464 100644
--- a/main.yml
+++ b/main.yml
@@ -33,6 +33,9 @@
       when: configure_osx
       tags: ['osx']
 
+    - include: tasks/extra-packages.yml
+      tags: ['extra-packages']
+
     - name: Run configured post-provision ansible task files.
       include: "{{ outer_item }}"
       loop_control:
diff --git a/tasks/extra-packages.yml b/tasks/extra-packages.yml
new file mode 100644
index 0000000..8de15ca
--- /dev/null
+++ b/tasks/extra-packages.yml
@@ -0,0 +1,31 @@
+---
+- name: Install global Composer packages.
+  composer:
+    command: "{{ (item.state | default('present') == 'absent') | ternary('remove', 'require') }}"
+    arguments: "{{ item.name | default(item) }} {{ item.version | default('@stable') }}"
+    # Ansible 2.4 supports `global_command` making `working_dir` optional.
+    working_dir: "{{ lookup('env', 'COMPOSER_HOME') | default('~/.composer', true) }}"
+  with_items: "{{ composer_packages }}"
+
+- name: Install global NPM packages.
+  npm:
+    name: "{{ item.name | default(item) }}"
+    version: "{{ item.version | default('latest') }}"
+    state: "{{ item.state | default('present') }}"
+    global: yes
+  with_items: "{{ npm_packages }}"
+
+- name: Install global Pip packages.
+  pip:
+    name: "{{ item.name | default(item) }}"
+    version: "{{ item.version | default(omit) }}"
+    state: "{{ item.state | default('latest') }}"
+  with_items: "{{ pip_packages }}"
+
+- name: Install global Ruby gems.
+  gem:
+    name: "{{ item.name | default(item) }}"
+    version: "{{ item.version | default(omit) }}"
+    state: "{{ item.state | default('latest') }}"
+    user_install: false
+  with_items: "{{ gem_packages }}"