docs: add link to other repos

Author: sgratzl

README.md

@@ -4,11 +4,20 @@
 
 Chart.js module for charting box and violin plots. This is a maintained fork of [@datavisyn/chartjs-chart-box-and-violin-plot](https://github.com/datavisyn/chartjs-chart-box-and-violin-plot), which I originally developed during my time at datavisyn.
 
-**Works only with Chart.js >= 3.0.0**
-
 ![Box Plot](https://user-images.githubusercontent.com/4129778/42724341-9a6ec554-8770-11e8-99b5-626e34dafdb3.png)
 ![Violin Plot](https://user-images.githubusercontent.com/4129778/42724342-9a8dbb58-8770-11e8-9a30-3e69d07d3b79.png)
 
+## Related Plugins
+
+Check out also my other chart.js plugins:
+ * [chartjs-chart-error-bars](https://github.com/sgratzl/chartjs-chart-error-bars) for rendering errors bars to bars and line charts
+ * [chartjs-chart-geo](https://github.com/sgratzl/chartjs-chart-geo) for rendering map, bubble maps, and choropleth charts
+ * [chartjs-chart-graph](https://github.com/sgratzl/chartjs-chart-graph) for rendering graphs, trees, and networks
+ * [chartjs-chart-pcp](https://github.com/sgratzl/chartjs-chart-pcp) for rendering parallel coordinate plots
+ * [chartjs-chart-venn](https://github.com/sgratzl/chartjs-chart-venn) for rendering venn and euler diagrams
+ * [chartjs-chart-wordcloud](https://github.com/sgratzl/chartjs-chart-wordcloud) for rendering word clouds
+ * [chartjs-plugin-hierarchical](https://github.com/sgratzl/chartjs-plugin-hierarchical) for rendering hierarchical categorical axes which can be expanded and collapsed
+
 ## Install
 
 ```bash