mholgatem

SpeedView drawer open in Canvas SpeedGrader, showing a student's zip file, Verilog source and a waveform viewer

Browser extension · Chrome & Firefox

SpeedView for Canvas

SpeedGrader only previews a handful of file types. SpeedView adds a drawer right next to the grading panel that opens everything else, so you stop downloading and unzipping submissions one student at a time.

Zip & tar archives browsed in place, nested ones included
Source code with highlighting: Python, Verilog, VHDL, C/C++, assembly and more
Notebooks, Word, Excel, PowerPoint, Markdown, CSV and PDFs
VCD waveforms drawn GTKWave-style, with saved signal layouts
FERPA-friendly: student files never leave your browser

Chrome Web Store Firefox Add-ons Source

In-browser code editor

Syntax

A fast, private code editor with the everyday features of a desktop text editor. Drop in files or whole folders; they open as tabs and are never uploaded.

60+ languages, with first-class Verilog, SystemVerilog, VHDL and Tcl/XDC
HDL tools: outline, go-to-definition, copy as instance, align statements
Side-by-side diff, split views, and find & replace across every tab
Themes from Solarized to Gruvbox, plus a CRT-style Mode 13h

Open Syntax Source

Raspberry Pi · Rust

GPIOnext

Turn your Raspberry Pi's GPIO pins into virtual gamepads. A low-latency GPIO-to-HID daemon for arcade cabinets, compatible with RetroPie, PiPlay, Recalbox and Batocera.

Precompiled Rust binaries for lower input latency
I2C expanders (MCP23017, PCF8574) for extra virtual pins
Terminal config tool that works on Lite OS images and over SSH
System commands on buttons: volume, shutdown and more

$ curl -fL https://raw.githubusercontent.com/mholgatem/GPIOnext/main/manage | bash

View on GitHub Latest release

Digital Logic Lab

Open the lab

Interactive tools and games for learning digital logic: state machines, K-maps, multiplexers, decoders, flip-flops, and a waveform viewer for simulation output.

FSM Designer

Build, visualize, and verify finite state machines (Moore & Mealy).

New

K-map Visualizer

Visualize and play with Karnaugh maps (SOP & POS).

New

Waveform Viewer

View simulation output (VCD, FST, LXT, LXT2, VZT) and GTKWave save files in the browser.

Mux Logic Tool

Explore Karnaugh map symmetry and multiplexer logic interactively.

Decoder Lab

Interactive puzzles to understand binary-to-decimal decoding.

Latches & Flip-Flops

Visualizers for latches and D, T, JK memory elements.

PDF Tools

Open PDF Tools

Simple, private PDF editing that runs entirely in your browser. No uploads, no accounts.

Combine PDFs

Merge multiple PDFs into a single document in any order.

Split PDF

Extract page ranges from a PDF into separate files.

Repaginate

Slice a tall single-page PDF into standard-sized pages for printing.

Form Editor

Add interactive form fields to any PDF and save with AcroForms support.