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A coding problem bank with topic and difficulty choices

A live ledger with approval rules and traceable accounting corrections

David Jonathan Ross’s type library with full-featured font trials.

Research and backtest quantitative strategies in notebooks and code

Review business spending before it reaches the ledger

Model paint-like colour mixing in a JavaScript application.

Data and AI courses organized around career paths

Free introductory open courses including software engineering

Coding programs centered on algorithms and web development

Use a Vim-based editor with Lua configuration, a documented API, and remote-procedure-call support for extensions.

A beginner-focused BASIC IDE with instant graphics, a step debugger, and a browser-based WebAssembly edition.

A no-code app builder for designing, building, and publishing iOS, Android, and web apps.

Coding problems and short routes for technical interviews

A Python-focused desktop IDE with project management, debugging, code checks, and an extensible plug-in system.

A KDE editor for multi-file coding with split views, project navigation, search, and plugins.

Code interviews and explore research themes with AI linked to original passages.

Technical learning with courses and coding-practice platforms

Design cloud infrastructure visually and generate Terraform code for AWS.

AI web developer that builds and publishes websites from chat prompts

Application monitoring software that connects errors, logs, replays, spans, profiles, and metrics by trace.

AI website builder that creates and hosts self-optimizing sites

Free AI chatbot for chat, writing, coding, PDFs and images

AI tools that turn plain English into spreadsheet formulas, scripts, and data analysis.

AI tool that turns text into SQL queries in seconds.