There are 2 repositories under xterm-256color topic.
Xterm/VT100 Terminal emulator in Swift
VT220-compatible console on Cyclone IV EP4CE55F23I7
xterm的iterm2主题库
Easy, readable color management
Print an image in an xterm-256 colors terminal
terminfo for xterm-256color/no-alt-screen/mouse-motion.
All 256 xterm colors with their RGB equivalents, right in Vim!
my custom xterm configurations
A next generation Mac OS terminal emulator and task runner
Convert between 256 colors and RGB