add packages page

README.md

@@ -24,6 +24,7 @@
    * [colcon](pages/colcon.md) is the build tool.
    * ```ros2 doctor --report``` gives tons of information.
 * [CMake](pages/cmake.md)
+* [Package Documentation](pages/packages.md)
 * Status Pages
   * [Foxy Debian Build Status](http://repo.ros2.org/status_page/ros_foxy_default.html)
   * [Rolling Debian Build Status](http://repo.ros2.org/status_page/ros_rolling_default.html)

pages/packages.md

@@ -0,0 +1,15 @@
+# Package Documentation
+
+Currently, documentation is a bit all over the place. This list is certainly
+not extensive, but I find it helpful to have quick links to the frequently
+used packages.
+
+## Core Documentation
+
+ * [ROS 2 Overview](https://index.ros.org/doc/ros2/)
+ * [Ament CMake](https://index.ros.org/doc/ros2/Tutorials/Ament-CMake-Documentation/)
+ * [ROS2 Launch](https://github.com/ros2/launch/blob/master/launch/doc/source/architecture.rst)
+
+## Higher Level Packages
+
+ * [Navigation2](https://navigation.ros.org/)