According to @santimentfeed, the top Ethereum ecosystem coins by development activity as of Oct 16, 2025 are 1) MetaMask mUSD, 2) Chainlink LINK down month over month, 3) Ethereum ETH flat, 4) Starknet STRK down, 5) EigenLayer EIGEN flat, 6) Audius AUDIO up, 7) Status SNT down, 8) Decentraland MANA down, and tied 9) Lido LDO up and stETH up, with arrows indicating change vs last month (source: Santiment X post on Oct 16, 2025). Santiment states it filters notable GitHub activity across project repositories to produce these rankings and argues this metric is useful for crypto trading by spotlighting fundamentally active teams (source: Santiment methodology referenced in the X post). For traders, Santiment’s month-over-month direction signals can help prioritize watchlists and adjust risk within ETH ecosystem assets based on rising or fading developer momentum (source: Santiment X post and methodology).