I use only a couple tools.
sewing machine
mat
rottary cutter
6x24 ruler
nice pair of scissors
iron
I own a 12.5x12.5 ruler it hangs out in the drawer. I also have a 6.5x12 ruler it rarely gets used. I bought a circle cut template to make a quilt. Used it the one time its hung out in the drawer since. I think my sister is going to use it to make circles for her sons bedroom walls so it MAY get used again. I cut triangles with a square/rectangle ruler that is marked with 45 or 60 degree marks.