Master programming by recreating your favorite technologies from scratch.

Move Base Flex: A Highly Flexible Navigation Framework

A ros package that includes plugins and nodes to convert occupied costmap2d cells to primitive types

GUI tool for editing ROS 2 parameters at runtime

BehaviorTree.CPP utilities to work with ROS2

A better local controller for ROS Navigation.

System modes for ROS 2 and micro-ROS

Messages and libraries for operating on two dimensional polygons.

RVIZ2 plugins for visualization of vision_msgs

ROS2 parameter server which caches parameter into the storage if necessary and reload it during initialization.

A living documentation of automate-able and manual steps for porting ROS packages to ROS2

ROS2 Navigation Framework and System

https://navigation.ros.org/

Mathematics for Robotics

rclcpp (ROS Client Library for C++)