There are 2 repositories under dappsys topic.
Composable building blocks for Ethereum contracts
a proxy object that can compose transactions on owner's behalf
Safe arithmetic
A simple and sufficient ERC20 implementation
Updatable, unobtrusive Solidity authorization pattern
DSAuth-protected ERC20 token vault
Multisig with a command-line interface
Whitelist DSAuthority for use with DSAuth
Log function calls as events
A DSAuthority for up to 256 roles
Set and get a value
Better exception handling
Build Nft Marketplace on Ethereum With Polygon From Scratch
DSValue with expiry
Your things should be DSThings
DSAuth-protected stop and start