I like Yed(1)for charts and graphs. It works in Linux/Win/Mac and is freely available, but not open source. 1) https://www.yworks.com/products/yed https://www.

I like Yed(1)for charts and graphs. It works in Linux/Win/Mac and is freely available, but not open source. 1) https://www.yworks.com/products/yed https://www.yworks.com/products/yed