Here is a screenshot of the desktop with a number of the submenus opened up:
EazyDraw has tool palettes built-in for more than your standard graphics. It also has technical libraries, math functions, dimensioning capability, and more. It is fully capable of handling layers and complex blending effects. You can see more at the website above.
Here's a graphic from their website that shows a water irrigation schematic:
You can also go the other way and do very creative artistic work. Here's another one from their gallery:
Like any complex package, EazyDraw takes a little getting use to but there is not only good help files in the program but a 300 page manual which you can buy as an extra either as a pdf or as a printed book. If you want to try EazDraw, you can download the program and use it for two weeks for free. If you really want to try it, you can pay $20 for a nine-month license which you can then upgrade to a full-license for the difference in price.
Take a look at EazyDraw if you are looking for a good value. Of course, if you can get Illustrator for under $100 at student pricing, you might do that instead.
p.s. EazyDraw's creators are not the same as EasyCrop which I blogged about earlier.
p.p.s. You might notice in the top graphic the picture I created for my Tech Almanac blog on Rufus Porter's airship. I basically traced and filled in images of the three airships and then expanded or contracted them to be the same scale. It wasn't hard at all and it was my first real project with the software.