Extras

Non-academic projects.

Teaching tools and side projects built outside the lab — interactive demos, everyday apps, and open-source experiments.

Side projects

Everything outside the research page

One of these runs right here on this site; the others live on their own deployments.

Electrostatic Field Simulator

A virtual conductive-paper sheet for PHY 151

Place a charged disc and a grounded bar on the paper and the page solves Laplace's equation over the whole sheet. Explore equipotentials, follow field lines, and check right angles the way you would with the four-point probe in the lab.

Next.jsTypeScriptMultigrid + CGPhysics teaching

Open

API Bank

Self-hosted secret vault with proxy + CLI

Docs · live

Per-user encrypted vault with masked previews and reveal-on-demand, Bearer API keys, a host-allowlisted proxy so third-party keys never touch client machines, a zero-dependency site-vault CLI, and an admin board — behind better-auth sign-in with free TOTP two-factor.

Next.jsbetter-authTursoCLI

Open

Khagna

Best price & best card

Coming soon

Item-first grocery price comparison (English + Bengali names) with per-unit normalization, city + radius + map search, store-vs-online prices, a multi-item basket optimizer, and ranked credit-card recommendations. Manual prices plus a server scraper keep listings fresh.

Next.jsLeaflet / OSMTursoCloudinary

Preview soon

Dhar

Shared expense tracker — a Splitwise successor

Live

Free, open-source expense-sharing app. Create groups, add participants, split bills evenly / by shares / by percentage / by exact amounts, track balances, record reimbursements, itemize bills, and scan receipts with AI. Works offline as a PWA in 20+ languages.

Next.js 16Auth.jsPostgreSQL / PrismatRPC

Open live Source on GitHub →

Looking for the research tools?

oxDNA, oxView, fastDNA and the rest live on the research page.

Go to research →