A tiny library for configurable virtual clocks

The mock namespace: named mocks, HTTP interceptors, feature flags and a virtual clock.

yaebal test — an actor-driven test framework for yaebal bots: users/chats that send real updates, a virtual clock, apiError stubs, and satellite-plugin test packs.

Tree-walking interpreter and virtual clock for the Linden Scripting Language (LSL).

Fake JavaScript timers

Deterministic virtual clock for Node.js. Replaces `Date`, `setTimeout`, `setInterval`, `clearTimeout`, `clearInterval`, and `performance.now()` with manually-controllable fakes.

Webpack Virtual Modules

Simulation harness for CrashLab. Orchestrates all modules: virtual clock, seeded PRNG, scheduler, HTTP/TCP interceptors, virtual filesystem, and fault injector. Provides `Simulation` class with `scenario()`, `run({ seeds })`, and `replay({ seed, scenario

Portable capture driver for antics games — virtual clock, scripted input, per-tick traces. Runs the same way on the user's machine (antics-mcp) or on the server (fallback).

Redis RESP protocol mock for CrashLab. Supports 16 commands: GET, SET, DEL, EXPIRE, TTL, INCR, DECR, LPUSH, RPUSH, LPOP, RPOP, HSET, HGET, SMEMBERS, SADD, ZADD, ZRANGE. TTL integrates with virtual clock. Throws `CrashLabUnsupportedRedisCommand` for unsupp

An analog clock for your React app.

React Virtual List Component

Virtual scrolling list component for React.

A virtual scheduler for @most/core

Load virtual modules from memory

A simple clock/ticker implementation to track elapsed/delta time.

Parses well-formed HTML (meaning all tags closed) into an AST and back. quickly.

Smooth scrolling for any amount of data

Angular DevKit - Core Utility Library

Hooks for virtualizing scrollable elements in React