Material designed icon


I am asking you for help, I need to make an unusual icon in my menu (sidebar ex.). What free programs or applications you recommend to edit ttf fonts I need to edit the materialdesign.ttf ( font and add or replace one.


Ehh I looked for a bit and found something like:
Edit: This program has problems importing the MaterialIcons-Regular.ttf file, after editing or adding a new icon it makes an error somewhere and the icons are no longer visible.

I am not recommending the lack of export to ttf in the free version below

Maybe it will be useful to someone. For sure, and maybe you have some favorite tool for designing your own icons?