We operate a small set of free/low-cost personal software projects, including italian.mcquarrie.cc (a free web app for learning Italian vocabulary through flashcards) and lappacer.mcquarrie.cc (LapPacer, a real-time swim pacing app for Apple Watch/iPhone that gives pool swimmers live pace guidance and logs sessions to the Health app). Stripe is used to accept optional donations and/or app purchases related to these projects.