Jeff Kaufman

Jeff Kaufman revived his lightweight MBTA bus predictions page, originally built in 2015 using the NextBus API, after the Massachusetts Bay Transportation Authority moved to its own API and broke the …

Jeff Kaufman updated his digital Secular Solstice Songbook to support chord transposition, fix chord display issues when scrolling, and improve grid alignment. The changes, implemented mostly through …

Jeff and Julia Wise drew on their savings to donate 81% of their income in 2025, up from their previous 50% giving rate, citing a critical window to prevent catastrophic outcomes from the introduction…