winlog emits Windows ETW TraceLogging events from Ruby with no manifest, no message DLL, no registry writes, and no elevation: register a provider by name (standard ETW name-hashed GUID), then log runtime-dynamic events with typed fields (UTF-8 text, binary, int64, double, boolean) plus levels, keywords, opcodes, and explicit activity IDs for correlation. Events are self-describing and decode in WPA, PerfView, and the inbox logman/tracerpt with zero setup; when no session is listening, a log call is gated in native code before field processing and costs about one Ruby method call. Built on Microsoft's MIT-licensed TraceLoggingDynamic.h (vendored). Emit-only: events go to ETW sessions, not the Windows Event Log. Windows MSVC (mswin) Ruby only.

winloop is a Ruby Fiber::Scheduler built on Win32 I/O Completion Ports. It makes ordinary socket I/O, sleeps, timeouts and Mutex/Queue/Thread#join run cooperatively on a single thread — the async-runtime story that has always been weak on Windows, done the way libuv/mio/wepoll do it: readiness over an IOCP via \Device\Afd polling, with recv/send driven by the completion port. Requires a native Windows MSVC (mswin) build of Ruby.

gem install winningest

The WinPrint library offers a way to send raw data to a system printer on windows. It also allows to fetch the printer list.

winproc is a native extension for controlling Windows processes the way the OS intends: argv-array spawning with exact quoting and per-handle inheritance (PROC_THREAD_ATTRIBUTE_HANDLE_LIST), job objects with kill-on-close so a spawned tree can never outlive you (even across a crash), atomic job placement at creation, ConPTY pseudoconsoles for real interactive terminal I/O, and elevation helpers (elevated?/admin?, ShellExecuteEx "runas", scoped token privileges). Blocking waits release the GVL and cooperate with a fiber scheduler. Windows MSVC (mswin) Ruby only.

winreg is a native extension exposing the Win32 registry through a typed, hard-to-misuse Ruby API: strict typed readers and writers for REG_SZ, REG_EXPAND_SZ (never auto-expanded), REG_MULTI_SZ (correct double-NUL wire format), REG_DWORD/REG_QWORD (range-checked), and REG_BINARY, with raw escape hatches for adversarial data; default-value access; 32/64-bit registry views as a first-class option applied consistently to child operations; least-privilege KEY_READ defaults; and RegNotifyChangeKeyValue change watching (thread-agnostic registrations, rearm-before-deliver) that blocks cooperatively under a Fiber scheduler and releases the GVL standalone. Windows MSVC (mswin) Ruby only.

winsvc runs a Ruby process as a Windows service (SERVICE_WIN32_OWN_PROCESS) with correct service-control-manager integration: the control handler is pure C (no Ruby ever runs on an SCM thread), controls arrive on a Thread::Queue (fiber-scheduler cooperative), SERVICE_STOPPED is reported exactly once, and checkpoints are only ever honest. The same block runs unchanged as a console program for development. Includes a minimal installer (CreateServiceW, delayed auto-start, restart-on-failure recovery) and a correctly quoted sc.exe command generator. Windows MSVC (mswin) Ruby only.

WinterTc provides a Ruby HTTP client whose interface mirrors the JavaScript Fetch API as closely as possible. It exposes WinterTc::Request, WinterTc::Response, WinterTc::Headers, and WinterTc.fetch — all with the same semantics as their browser counterparts. No runtime gem dependencies: only Ruby's built-in net/http, uri, and json are used.

wintoast pops native Windows toast notifications from plain Ruby scripts using the WinRT notification API that ships with Windows — no Windows App SDK, no packaging, no COM activation server, no elevation — and drives progress on the taskbar button (ITaskbarList3) and the Windows Terminal tab (OSC 9;4) at the same time, so progress shows up under classic conhost AND modern terminals. API: Wintoast.toast (title/body/attribution, app logo + hero images, system sounds, duration, scenario, expiration, tag/group), Wintoast.register! / unregister! (opt-in, reversible, per-user HKCU AppUserModelId branding — no shortcut, no admin), Wintoast.progress / progress_clear, and Wintoast::Payload.build for inspecting the exact toast XML. Windows MSVC (mswin) Ruby only.

winwatch watches a directory (optionally a whole subtree) with a single overlapped ReadDirectoryChangesW operation and delivers :added/:modified/ :removed/:renamed events with absolute UTF-8 paths. Kernel buffer overflow is surfaced as an explicit :rescan event (never silently dropped) and a dying watch (root deleted, network loss) as a terminal :gone event. Blocking pulls release the GVL and are interrupt-safe; under the winloop fiber scheduler the watcher parks fibers on the loop's completion port with zero extra threads. Public API: Winwatch.watch(path, recursive:, filter:, buffer_size:, normalize_names:) with a block form, Watcher#take/#each/#close, and a frozen Winwatch::Event struct. Windows MSVC (mswin) Ruby only.

Makers unite through WIP.chat API to build more awesomeness!

Implementation of ISO 20022 payment initiation (pain) messages and bank providers for wire transfers

A lightweight, declarative dependency-provider

A lightweight dependency injection framework to help wire up objects in Ruby

Wires extension gem for integration with icalendar events.

Wires extension gem to integrate with inotify via rb-inotify.

Witei Web API

Temporarily add context to failing tests to get more information, such as what HTML was being examined when a browser-based test fails.

Perform some actions on a git repo then push the results back

An extension for ActiveRecord for finding broken associations