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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.

Develop Python in a project-aware desktop IDE with a debugger, test runner, and optional coding-agent tools.

A fantasy console with a compact Lua coding environment and built-in sprite, map, sound, and music editors.

View Google, Outlook, and iCloud events beside tasks, reminders, and shared plans.

Research and backtest quantitative strategies in notebooks and code

Data and AI courses organized around career paths

Free introductory open courses including software engineering

Coding programs centered on algorithms and web development

Build hiring assessments and review results, with candidate credits consumed on completed submissions.

Review business spending before it reaches the ledger

Model paint-like colour mixing in a JavaScript application.

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

A browser IDE for programming courses, with Linux project environments and an integrated terminal.

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

AI model from Moonshot AI for reasoning, coding, and agentic tasks.

Coding problems and short routes for technical interviews

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

Technical learning with courses and coding-practice platforms

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

Design cloud infrastructure visually and generate Terraform code for AWS.

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

AI testing platform for web, mobile, API and desktop QA