Sentientia
A personal belief ledger: track your beliefs as probabilistic credences over time.
Most beliefs are held at unstated confidence levels, never written down, and revised only when social pressure demands it. When people do try to update, the anchoring effect pulls the new estimate towards the old one regardless of what evidence has arrived. Sententia is a single-file browser application that records beliefs as probabilistic credences on a 0-to-1 scale and surfaces them for blind review: you submit a new estimate before your previous value is revealed, breaking the anchoring loop. Everything stays in the file itself, with no server and no account.
Meridian
A sophisticated personal giving tracker and dasboard.
Effective donors typically carry the same fragmented setup: a spreadsheet for amounts, a browser tab for GiveWell's cost-effectiveness tables, a rough mental estimate of pledge compliance. None of it is integrated, and the gap between the components is where rigour disappears.
Meridian is a single-file giving dashboard that runs entirely in your browser. It computes expected impact in DALYs for each charity in your portfolio, anchored to GiveWell's benchmark, and combines this with donation history, UK Gift Aid, pledge tracking, and cause allocation in one view. No data leaves your machine.
Deliberatio
A structured decision tool grounded in moral uncertainty.
Hard decisions are hard because you hold genuine uncertainty across moral frameworks that give different verdicts. The standard response is to pick whichever framework supports the conclusion you were already leaning towards. That is motivated reasoning, not principled deliberation.
Deliberatio makes that move difficult. It implements Will MacAskill's Maximising Expected Choice-Worthiness principle: enable the theories you take seriously, assign a credence range to each, score your options before seeing any result, and the tool computes a weighted recommendation. Twenty-two theories across seven families are included. When the result is close, six structured tie-breakers appear in sequence. All data stays in your browser.