Abhay Raj Singh

Hospital waiting rooms are crowded, and patients never know when their turn is. Quevaa lets patients scan a QR code, get a live queue token in their phone browser with no app, and watch their position and estimated wait. Staff call, skip, recall and prioritise emergency cases from a dashboard. Updates sync instantly over WebSockets, and atomic PostgreSQL functions prevent duplicate tokens.

Academic Q&A gets messy when every reply lands in one feed. RecursiveQnA gives questions and answers their own nested discussion threads, so peer review stays focused. Authors can attach rich text, diagrams and video to answers and mark verified solutions, and moderators get an analytics dashboard. Used and tested by friends.

Solving a Rubik's cube manually requires remembering dozens of complex algorithms. CubeSolver captures cube faces via camera or image upload, verifies state parity with an interactive 2D net editor, and computes the optimal solution in milliseconds directly in the browser using Kociemba's Two-Phase algorithm compiled from Rust to WebAssembly. Includes an interactive 3D Three.js cube with step-by-step move playback.