JasonHo

Drop in notes, a PDF or a YouTube link and get a deck of flashcards. Live, with sign-in and subscriptions.

• Pulls the key points out of whatever you give it and writes question-and-answer cards with Gemini, grounded in your material.
• Generation runs as a background job that retries on failure, so a slow video or a big PDF never times out the page.
• A real product end to end: sign-in, a free trial, then paid plans through Stripe.

A desktop app that records your meetings, capturing the screen as well as the audio, and writes the notes for you.

• Records your microphone and your Mac's sound, so both sides of a call make it into the notes.
• Can also capture a screen or window, so what was shown, like slides and charts, ends up in the notes too.
• Saves everything on your computer as it records, so closing the app never loses a meeting.

Learns from how you're feeling and what you've chosen before, then recommends what to eat.

• Picks up how you're feeling, whether tired, stressed or celebrating, and weighs it alongside the time and the weather.
• Learns from your past choices, so its picks get closer to your taste the more you use it.
• Leads with one clear recommendation and a few close alternatives, instead of an endless list.

Flappy Bird, built from scratch, then taught to play itself with an evolving neural network.

• Built the game in Pygame, then let a population of fifty birds learn to play it with NEAT.
• Birds earn points for every pipe they pass and lose them for crashing; each generation is bred from the best.
• By the third generation, the best bird scores 300 without dying.

A compiler for the WACC language, written in Scala by four of us, that turns programs into ARM machine code.

• Supports the full language: classes, functions, pointers, arrays and loops.
• A scalable syntax tree and intermediate representation carry each program through syntax and semantic checks to AArch64 assembly, with the Builder pattern keeping error reporting structured.
• Every change is compiled, tested and run automatically through GitLab CI/CD, using a WACC Docker container and GCC cross-compilation with QEMU to emulate AArch64.

An operating system kernel in C: thread scheduling, system calls and virtual memory, built by four of us.

• A scheduler where urgent threads go first, and a thread holding a lock borrows the priority of whoever is waiting on it.
• System calls so user programs can run, start other programs and read and write files.
• Virtual memory that loads pages only when they're needed, swaps to disk when memory runs out and grows the stack on demand.

A desktop editor for ARM assembly that builds and runs your code in one window.

• Write, build and run in one place: it assembles your code and emulates it as a Raspberry Pi would, using an assembler and emulator our team wrote.
• Catches mistakes as you type, with autocomplete for every instruction and errors underlined on the spot.
• Written in C with GTK, with tabs, keyboard shortcuts and light, dark and Catppuccin themes.