Tools

Free tools we've built for learners and the community. They run in your browser — no sign-up needed.

Kanban board

Plan tasks with columns, cards, priorities and due dates. Drag cards between columns; export a backup any time.

253 LeetCode problems across 17 topics and 36 patterns. Mark problems solved, bookmark them and keep notes.

Focus in 25-minute sessions with short and long breaks. Chime and desktop notifications when time's up, plus a count of today's sessions.

Turn any link or text into a QR code. Pick the exact size, colours and error correction, then download a PNG or SVG.

தமிழ் பெயர் இடைவெளி

Find shops, roads and places on OpenStreetMap in Tamil Nadu cities that are missing their Tamil name — and add them.

Code we wrote to run TOSSConf — free to use for your own community event.

Reads participant lists from CSV, creates a PDF pass with a QR code for each person, and emails it to them.

A web app for check-in at the venue: scan pass QR codes, verify them, log entry for each event day and follow it on a dashboard.