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Apps we loveDecide with physics, before you pay for simulation.A physics-informed engineering screening workspace with live workbenches that re-solve results and sensitivity curves on every keystroke, plus a Simulation Studio running real 2D finite-difference field solvers (heat conduction, potential flow, process uniformity) in the browser. Includes saved runs with baseline comparison, report exports, Gemini-backed analysis chat, and a tutorial hub — built for fast early R&D screening, not as a replacement for validated CFD, FEA, process simulation, or physical testing.Phoenix EngineEngineering

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Apps we loveMock interviews that feel like the real thing.PrepTalk — interviews for the web.

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Phoenix EngineDecide with physics, before you pay for simulation.GetOpen Source MagicPenSay what to change. Nothing else moves.GetOpen Source PrepTalkMock interviews that feel like the real thing.GetOpen Source

Apps we love

Mock interviews that feel like the real thing.

PrepTalkInterviewsGet

PrepTalk. A full-stack mock interview and coding assessment platform where interviewers create sessions, run live video/chat rooms with a shared notes and code workspace, and review structured scorecards and reports, while candidates join assigned sessions and complete lab assessments with local visible-test runs and server-side final grading. Includes role-based dashboards, JWT cookie auth, Gemini-powered question banks, prep guides and debugging hints, lab assessment builders with deadlines and PDF export, and realtime presence over Ably with WebRTC video.

Under the hood: Next.js 15 · React 19 · JavaScript · MongoDB · Mongoose · Tailwind CSS · Ably · WebRTC · Gemini API · Framer Motion · Zod · Jose (JWT) · Bcryptjs.

Live site Source

Interviews

Mock interviews that feel like the real thing.

PrepTalkInterviews · LiveOPENOpen source

PrepTalk A full-stack mock interview and coding assessment platform where interviewers create sessions, run live video/chat rooms with a shared notes and code workspace, and review structured scorecards and reports, while candidates join assigned sessions and complete lab assessments with local visible-test runs and server-side final grading. Includes role-based dashboards, JWT cookie auth, Gemini-powered question banks, prep guides and debugging hints, lab assessment builders with deadlines and PDF export, and realtime presence over Ably with WebRTC video.

Built with

Next.js 15
React 19
JavaScript
MongoDB
Mongoose
Tailwind CSS
Ably
WebRTC
Gemini API
Framer Motion
Zod
Jose (JWT)
Bcryptjs

Live site Source