Build Your Own X
I'd like to see the following added:*Build your own firmware/bootloader*Build your own FPGA/ASIC*Build your own sound library/engine/driver*Build your own GUI Toolkit/graphics library*Build your own font (vector and bitmap)*Build your own character encoding standard (à la ASCII, Unicode, etc.)*Build your own MMO*Build your own protocols*Build your own mouse*Build your own keyboard*Build your own mail client and server*Build your own VoIP client (à la Discord, Skype, etc.)*Build your own instant messenger ( à la IRC, AOL, etc.)*Build your own programming language*Build your own markup/typesetting language*Build your own compiler, interpreter and assembler*Build your own machine code & microcode*Build your own filesystem*Build your own softmodem*Build your own SDR*Build your own BBS*Build your own painting application/photo editor*Build your own internet browser*Build your own cryptography*Build your own compression algorithms*Build your own webcam and webcam client*Build your own virtual voice assistant*Build your own girlfriend ;)