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Calculate returns, portfolio statistics and allocation weights in Python

Deploy full-stack Next.js and Angular apps from GitHub onto Google's managed web infrastructure.

Build historical market simulations with configurable orders and costs

Edit SVGs and build custom icon packs, sprites and fonts.

Test entry and exit rules against historical price bars

Manage manual test cases and runs, then bring automated results into a shared QA workspace.

A proxy-based API simulator that records traffic for repeatable tests without calling the real service each time.

An icon family with an array builder and React, Vue and Svelte packages.

Matching line and filled icons for app navigation and controls.

A visual testing service that compares screenshots and other snapshots from CI builds against a selected baseline.

A standalone icon library usable with or without Bootstrap.

Flag components with size-specific artwork and design-tool libraries.

Maintain event-driven Python backtests with the Zipline research model

Measure how well JavaScript and TypeScript tests detect deliberately introduced code changes.

Records web and mobile user flows as hosted automated tests, with AI prompts and run diagnostics.

Build equity-research reports with computed models and AI explanations

Instrument LLMs, agents, vector databases, and frameworks with OpenTelemetry-native AI monitoring.

Test email and SMS workflows by routing app-generated messages to controllable inboxes and numbers.

Add small reactive interactions to HTML with directives such as x-data, @click, and x-show.

Pattern references and comparisons for interface decisions

A customizable icon library with free source and optional paid bundles.

Run Python tests with readable assertions, fixtures, parametrization, and failure reports.

Build interactive Python applications for the terminal with widgets, CSS, and keyboard bindings.

Assemble portfolio backtests from reusable Python rules