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You can start by taking a look at the CarrotPlanner local planner, it is one of the most simple and you can build from there. To specify a planner different from the default ones, you can add one of these lines to a launch file, where you launch the move_base node.

  ## alternative global planners ##
  <!-- <param name="base_global_planner" value="goal_passer/GoalPasser"/> -->
  <!-- <param name="base_global_planner" value="carrot_planner/CarrotPlanner"/> -->
  <!-- <param name="base_global_planner" value="SBPLLatticePlanner"/>-->

  ## alternative local planners ##
  <!-- <param name="base_local_planner" value="pose_follower/PoseFollower"/> -->
  <!-- <param name="base_local_planner" value="dwa_local_planner/DWAPlannerROS"/> -->
  <!-- <param name="base_local_planner" value="eband_local_planner/EBandPlannerROS"/> -->

For example:

<node pkg="move_base" type="move_base" respawn="false" name="move_base" output="screen">
  <param name="base_global_planner" value="goal_passer/GoalPasser"/>
  <param name="controller_frequency" value="10.0" />
</node>