added atop

- signed-off-by: Kyle Birkeland <kylebirkeland@gmail.com>

README.md

@@ -135,6 +135,8 @@ for transferring data with URLs.<br>
 &nbsp;&nbsp;:small_orange_diamond: <a href="https://en.wikipedia.org/wiki/Lsof"><b>lsof</b></a> - displays in its output information about files that are opened by processes.<br>
 &nbsp;&nbsp;:small_orange_diamond: <a href="http://www.brendangregg.com/flamegraphs.html"><b>FlameGraph</b></a> - stack trace visualizer.<br>
 &nbsp;&nbsp;:small_orange_diamond: <a href="https://github.com/zevv/lsofgraph"><b>lsofgraph</b></a> - small utility to convert Unix lsof output to a graph showing FIFO and UNIX interprocess communication.<br>
+&nbsp;&nbsp;:small_orange_diamond: <a href="https://github.com/hishamhm/htop"><b>htop</b></a> - ASCII performance monitor.  Includes statistics for CPU, memory, disk, swap, network, and processes.<br>
+
 </p>
 
 ##### :black_small_square: Log Analyzers