i'm going to design and build a "programmer's numpad", because I'm sick of awkward hand movements for writing brackets with numbers and commas and spaces etc. here's the first draft. make your modifications here: http://www.keyboard-layout-editor.com/#/ i'm thinking of adding another column, putting something between the numbers and the plus/minus.
give it hexadecimal input. something like https://ipv6buddy.com/
aahh, now that would be interesting. i've always liked that all the letters of hex happen to be on lefthand side of keyboard anyway. instead of adding new keys i think i'd rather have A-F be shift of 0-5