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PHP explanations focused on common misconceptions

Developer tutorials and technical writing around practical software

A collaborative guide to implementing algorithms

Small interactive coding challenges

Run DuckDB-based analytics in a managed cloud warehouse and share results with a team.

Trigger personalized postcards, letters, and other physical mail from software.

A coding problem bank with topic and difficulty choices

The Scala 3 compiler and language toolchain for JVM projects and cross-platform code.

Connect online, app and in-person payments with flexible acquiring arrangements

Connect Australian bank collections, authorized payments and payouts

Search downloaded programming and framework documentation offline from a desktop reference library.

Generate API and project documentation from annotated source code.

A JavaScript font engine for glyph layout, paths and PDF subsets.

Build custom market scans and test chart-based strategies

Screen options, test explicit rules and inspect each simulated trade

Replay historical markets across charts and depth-of-market views

Research options in a browser or build on licensed historical datasets

Connect bank checkout to customer authorization and verified payment status

Crypto conversion with wallet delivery and separate business integrations

Collect Indonesian payments and send approved business disbursements

A distributed, memory-first SQL database for applications that need shared cluster state.

A browser editor for micro:bit projects with Blocks, JavaScript, Python, and a device simulator.

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

Summarize files, code, comments, and blank lines across a project by programming language.