diff --git a/README.md b/README.md
index f4015c7..f36e725 100644
--- a/README.md
+++ b/README.md
@@ -69,6 +69,9 @@ HPGL is a serial/text-based protocol used by most old pen plotters, and even man
 - [hp2xx](https://www.gnu.org/software/hp2xx) – GNU tool to convert HPGL into other vector and raster formats. Can also be used as a previewing in X11.
 - [vec](https://github.com/anachrocomputer/vec) – Example C code for generating HPGL, with a turtle graphics interface.
 - [d3-hpgl](https://github.com/aubergene/d3-hpgl) – An adapter for the HTML Canvas API so you can output HPGL using the popular [D3](https://d3js.org) library.
+- [HPGL Viewer](https://github.com/drskullster/HPGLViewer) - A HPGL Viewer in Javascript with an online demo
+- [HPGL Sender](https://github.com/LgHS/hpgl-sender) - Send HPGL to your plotter through a web interface with a preview
+- [TweetPlotBot](https://github.com/LgHS/TweetPlotBot) - Plot tweets for a specific hashtag in real time
 
 ### G-code