General utilities for developers

Time management

ERC-5007: Time NFT, ERC-721 Time Extension

ERC-6372: Contract clock

ERC-6806: ERC-721 Holding Time Tracking

ERC-7444: Time Locks Maturity

Data storage

On-chain

ERC-2569: Saving and Displaying Image Onchain for Universal Tokens

ERC-4804: Web3 URL to EVM Call Message Translation

ERC-5018: Filesystem-like Interface for Contracts

ERC-5219: Contract Resource Requests

ERC-6150: Hierarchical NFTs

ERC-6944: ERC-5219 Resolve Mode

ERC-7053: Interoperable Digital Media Indexing

ERC-7087: MIME type for Web3 URL in Auto Mode

ERC-7208: On-Chain Data Container

Off-chain

ERC-3668: CCIP Read: Secure offchain data retrieval

ERC-5559: Cross Chain Write Deferral Protocol

ERC-7412: On-Demand Off-Chain Data Retrieval

Smart-contract upgrades

ERC-897: DelegateProxy

ERC-1167: Minimal Proxy Contract

ERC-1504: Upgradable Smart Contract

ERC-1822: Universal Upgradeable Proxy Standard (UUPS)

ERC-1967: Standard Proxy Storage Slots

ERC-2535: Diamonds, Multi-Facet Proxy

ERC-3448: MetaProxy Standard

ERC-3561: Trust Minimized Upgradeability Proxy

ERC-7201: Namespaced Storage Layout

ERC-7511: Minimal Proxy Contract with PUSH0

General

ERC-2470: Singleton Factory

ERC-4974: Ratings

ERC-5202: Blueprint contract format

ERC-5732: Commit Interface

ERC-5289: Ethereum Notary Interface

ERC-6224: Contracts Dependencies Registry

ERC-6093: Custom errors for commonly-used tokens

ERC-6357: Single-contract Multi-delegatecall

ERC-7528: ETH (Native Asset) Address Convention

ERC-7627: Secure Messaging Protocol

ERC-7566: Multiplayer Game Communication