diff --git a/source/eventcore/drivers/kqueue.d b/source/eventcore/drivers/kqueue.d
new file mode 100644
index 0000000..4ed3316
--- /dev/null
+++ b/source/eventcore/drivers/kqueue.d
@@ -0,0 +1,107 @@
+/**
+	BSD kqueue based event driver implementation.
+
+	Kqueue is an efficient API for asynchronous I/O on BSD flavors, including
+	OS X/macOS, suitable for large numbers of concurrently open sockets.
+*/
+module eventcore.drivers.kqueue;
+@safe: /*@nogc:*/ nothrow:
+
+version (FreeBSD) enum have_kqueue = true;
+else version (OSX) enum have_kqueue = true;
+else enum have_kqueue = false;
+
+static if (have_kqueue):
+
+public import eventcore.drivers.posix;
+import eventcore.internal.utils;
+
+import core.time : Duration;
+import core.sys.posix.sys.time : timespec;
+
+version (OSX) import core.sys.darwin.sys.event;
+else version (FreeBSD) import core.sys.freebsd.sys.event;
+else static assert(false, "Kqueue not supported on this OS.");
+
+
+import core.sys.linux.epoll;
+
+
+final class KqueueEventLoop : PosixEventLoop {
+	private {
+		int m_queue;
+		kevent[] m_fds;
+		kevent[] m_events;
+	}
+
+	this()
+	{
+		m_queue = kqueue();
+		enforce(m_queue >= 0, "Failed to create kqueue.");
+	}
+
+	override bool doProcessEvents(Duration timeout)
+	@trusted {
+		import std.algorithm : min;
+		//assert(Fiber.getThis() is null, "processEvents may not be called from within a fiber!");
+
+		//print("wait %s", m_events.length);
+		timespec ts;
+		long secs, hnsecs;
+		dur.split!("seconds", "hnsecs")(secs, hnsecs);
+		ts.tv_sec = cast(time_t)secs;
+		ts.tv_nsec = hnsecs * 100;
+
+		auto ret = kevent(m_queue, m_fds, m_fds.length, m_events, m_events.length, timeout == Duration.max ? null : &ts);
+
+		if (ret > 0) {
+			foreach (ref evt; m_events[0 .. ret]) {
+				//print("event %s %s", evt.data.fd, evt.events);
+				auto fd = cast(FD)evt.ident;
+				if (evt.flags & EV_READ) notify!(EventType.read)(fd);
+				if (evt.flags & EV_WRITE) notify!(EventType.write)(fd);
+				if (evt.flags & EV_ERROR) notify!(EventType.status)(fd);
+				else if (evt.flags & EV_EOF) notify!(EventType.status)(fd);
+				// EV_SIGNAL, EV_TIMEOUT
+			}
+			return true;
+		} else return false;
+	}
+
+	override void dispose()
+	{
+
+		import core.sys.posix.unistd : close;
+		close(m_queue);
+	}
+
+	override void registerFD(FD fd, EventMask mask)
+	{
+		//print("register %s %s", fd, mask);
+		auto idx = allocSlot(fd);
+		kevent* ev = &m_events[idx];
+		ev.ident = fd;
+		ev.flags = EV_ADD|EV_ET|EV_ENABLE;
+		if (mask & EventMask.read) ev.filter |= EVFILT_READ;
+		if (mask & EventMask.write) ev.filter |= EVFILT_WRITE;
+		if (mask & EventMask.status) ev.events |= EPOLLERR|EPOLLRDHUP;
+	}
+
+	override void unregisterFD(FD fd)
+	{
+		auto idx = m_eventMap[fd];
+		m_events[idx].flags = EV_REMOVE;
+	}
+
+	override void updateFD(FD fd, EventMask mask)
+	{
+		//print("update %s %s", fd, mask);
+		auto idx = m_eventMap[fd];
+		epoll_event* ev = &m_events[idx];
+		ev.filter = 0;
+		ev.events |= EPOLLET;
+		if (mask & EventMask.read) ev.filter |= EVFILT_READ;
+		if (mask & EventMask.write) ev.filter |= EVFILT_WRITE;
+		if (mask & EventMask.status) ev.events |= EPOLLERR|EPOLLRDHUP;
+	}
+}
diff --git a/source/eventcore/drivers/posix.d b/source/eventcore/drivers/posix.d
index 8480586..6c39a52 100644
--- a/source/eventcore/drivers/posix.d
+++ b/source/eventcore/drivers/posix.d
@@ -1,7 +1,7 @@
 /**
 	Base class for BSD socket based driver implementations.
 
-	See_also: `eventcore.drivers.select`, `eventcore.drivers.epoll`
+	See_also: `eventcore.drivers.select`, `eventcore.drivers.epoll`, `eventcore.drivers.kqueue`
 */
 module eventcore.drivers.posix;
 @safe: /*@nogc:*/ nothrow:
diff --git a/source/eventcore/drivers/winapi.d b/source/eventcore/drivers/winapi.d
new file mode 100644
index 0000000..209c7ec
--- /dev/null
+++ b/source/eventcore/drivers/winapi.d
@@ -0,0 +1,367 @@
+/**
+	WinAPI based event driver implementation.
+
+	This driver uses overlapped I/O to model asynchronous I/O operations
+	efficiently. The driver's event loop processes UI messages, so that
+	it integrates with GUI applications transparently.
+*/
+module eventcore.drivers.winapi;
+
+version (Windows):
+
+import eventcore.driver;
+import std.socket : Address;
+import core.time : Duration;
+
+
+final class WinAPIEventDriver : EventDriver {
+@safe: /*@nogc:*/ nothrow:
+
+	private {
+		WinAPIEventDriverCore m_core;
+		WinAPIEventDriverFiles m_files;
+		WinAPIEventDriverSockets m_sockets;
+		WinAPIEventDriverDNS m_dns;
+		WinAPIEventDriverTimers m_timers;
+		WinAPIEventDriverEvents m_events;
+		WinAPIEventDriverSignals m_signals;
+		WinAPIEventDriverWatchers m_watchers;
+	}
+
+	this()
+	{
+		m_core = new WinAPIEventDriverCore();
+		m_files = new WinAPIEventDriverFiles();
+		m_sockets = new WinAPIEventDriverSockets();
+		m_dns = new WinAPIEventDriverDNS();
+		m_timers = new WinAPIEventDriverTimers();
+		m_events = new WinAPIEventDriverEvents();
+		m_signals = new WinAPIEventDriverSignals();
+		m_watchers = new WinAPIEventDriverWatchers();
+	}
+
+	override @property WinAPIEventDriverCore core() { return m_core; }
+	override @property WinAPIEventDriverFiles files() { return m_files; }
+	override @property WinAPIEventDriverSockets sockets() { return m_sockets; }
+	override @property WinAPIEventDriverDNS dns() { return m_dns; }
+	override @property WinAPIEventDriverTimers timers() { return m_timers; }
+	override @property WinAPIEventDriverEvents events() { return m_events; }
+	override @property WinAPIEventDriverSignals signals() { return m_signals; }
+	override @property WinAPIEventDriverWatchers watchers() { return m_watchers; }
+
+	override void dispose()
+	{
+		assert(false, "TODO!");
+	}
+}
+
+final class WinAPIEventDriverCore : EventDriverCore {
+@safe: /*@nogc:*/ nothrow:
+	override size_t waiterCount()
+	{
+		assert(false, "TODO!");
+	}
+
+	override ExitReason processEvents(Duration timeout = Duration.max)
+	{
+		assert(false, "TODO!");
+	}
+
+	override void exit()
+	{
+		assert(false, "TODO!");
+	}
+
+	override void clearExitFlag()
+	{
+		assert(false, "TODO!");
+	}
+
+	protected override void* rawUserData(StreamSocketFD descriptor, size_t size, DataInitializer initialize, DataInitializer destroy) @system
+	{
+		assert(false, "TODO!");
+	}
+}
+
+final class WinAPIEventDriverSockets : EventDriverSockets {
+@safe: /*@nogc:*/ nothrow:
+	override StreamSocketFD connectStream(scope Address peer_address, ConnectCallback on_connect)
+	{
+		assert(false, "TODO!");
+	}
+
+	override StreamListenSocketFD listenStream(scope Address bind_address, AcceptCallback on_accept)
+	{
+		assert(false, "TODO!");
+	}
+
+	override void waitForConnections(StreamListenSocketFD sock, AcceptCallback on_accept)
+	{
+		assert(false, "TODO!");
+	}
+
+	override ConnectionState getConnectionState(StreamSocketFD sock)
+	{
+		assert(false, "TODO!");
+	}
+
+	override void setTCPNoDelay(StreamSocketFD socket, bool enable)
+	{
+		assert(false, "TODO!");
+	}
+
+	override void read(StreamSocketFD socket, ubyte[] buffer, IOMode mode, IOCallback on_read_finish)
+	{
+		assert(false, "TODO!");
+	}
+
+	override void write(StreamSocketFD socket, const(ubyte)[] buffer, IOMode mode, IOCallback on_write_finish)
+	{
+		assert(false, "TODO!");
+	}
+
+	override void waitForData(StreamSocketFD socket, IOCallback on_data_available)
+	{
+		assert(false, "TODO!");
+	}
+
+	override void shutdown(StreamSocketFD socket, bool shut_read = true, bool shut_write = true)
+	{
+		assert(false, "TODO!");
+	}
+
+	override void cancelRead(StreamSocketFD socket)
+	{
+		assert(false, "TODO!");
+	}
+
+	override void cancelWrite(StreamSocketFD socket)
+	{
+		assert(false, "TODO!");
+	}
+
+	override DatagramSocketFD createDatagramSocket(scope Address bind_address, scope Address target_address)
+	{
+		assert(false, "TODO!");
+	}
+
+	override void receive(DatagramSocketFD socket, ubyte[] buffer, IOMode mode, DatagramIOCallback on_receive_finish)
+	{
+		assert(false, "TODO!");
+	}
+
+	override void cancelReceive(DatagramSocketFD socket)
+	{
+		assert(false, "TODO!");
+	}
+
+	override void send(DatagramSocketFD socket, const(ubyte)[] buffer, IOMode mode, DatagramIOCallback on_send_finish, Address target_address = null)
+	{
+		assert(false, "TODO!");
+	}
+
+	override void cancelSend(DatagramSocketFD socket)
+	{
+		assert(false, "TODO!");
+	}
+
+	override void addRef(SocketFD descriptor)
+	{
+		assert(false, "TODO!");
+	}
+
+	override bool releaseRef(SocketFD descriptor)
+	{
+		assert(false, "TODO!");
+	}
+}
+
+final class WinAPIEventDriverDNS : EventDriverDNS {
+@safe: /*@nogc:*/ nothrow:
+
+	DNSLookupID lookupHost(string name, DNSLookupCallback on_lookup_finished)
+	{
+		assert(false, "TODO!");
+	}
+
+	void cancelLookup(DNSLookupID handle)
+	{
+		assert(false, "TODO!");
+	}
+}
+
+
+final class WinAPIEventDriverFiles : EventDriverFiles {
+@safe: /*@nogc:*/ nothrow:
+	override FileFD open(string path, FileOpenMode mode)
+	{
+		assert(false, "TODO!");
+	}
+
+	override FileFD createTemp()
+	{
+		assert(false, "TODO!");
+	}
+
+	override void close(FileFD file)
+	{
+		assert(false, "TODO!");
+	}
+
+	override ulong getSize(FileFD file)
+	{
+		assert(false, "TODO!");
+	}
+
+	override void write(FileFD file, ulong offset, const(ubyte)[] buffer, FileIOCallback on_write_finish)
+	{
+		assert(false, "TODO!");
+	}
+
+	override void read(FileFD file, ulong offset, ubyte[] buffer, FileIOCallback on_read_finish)
+	{
+		assert(false, "TODO!");
+	}
+
+	override void cancelWrite(FileFD file)
+	{
+		assert(false, "TODO!");
+	}
+
+	override void cancelRead(FileFD file)
+	{
+		assert(false, "TODO!");
+	}
+
+	override void addRef(FileFD descriptor)
+	{
+		assert(false, "TODO!");
+	}
+
+	override bool releaseRef(FileFD descriptor)
+	{
+		assert(false, "TODO!");
+	}
+}
+
+final class WinAPIEventDriverEvents : EventDriverEvents {
+@safe: /*@nogc:*/ nothrow:
+	override EventID create()
+	{
+		assert(false, "TODO!");
+	}
+
+	override void trigger(EventID event, bool notify_all = true)
+	{
+		assert(false, "TODO!");
+	}
+
+	override void trigger(EventID event, bool notify_all = true) shared
+	{
+		assert(false, "TODO!");
+	}
+
+	override void wait(EventID event, EventCallback on_event)
+	{
+		assert(false, "TODO!");
+	}
+
+	override void cancelWait(EventID event, EventCallback on_event)
+	{
+		assert(false, "TODO!");
+	}
+
+	override void addRef(EventID descriptor)
+	{
+		assert(false, "TODO!");
+	}
+
+	override bool releaseRef(EventID descriptor)
+	{
+		assert(false, "TODO!");
+	}
+}
+
+final class WinAPIEventDriverSignals : EventDriverSignals {
+@safe: /*@nogc:*/ nothrow:
+	override SignalListenID listen(int sig, SignalCallback on_signal)
+	{
+		assert(false, "TODO!");
+	}
+
+	override void addRef(SignalListenID descriptor)
+	{
+		assert(false, "TODO!");
+	}
+
+	override bool releaseRef(SignalListenID descriptor)
+	{
+		assert(false, "TODO!");
+	}
+}
+
+final class WinAPIEventDriverTimers : EventDriverTimers {
+@safe: /*@nogc:*/ nothrow:
+	override TimerID create()
+	{
+		assert(false, "TODO!");
+	}
+
+	override void set(TimerID timer, Duration timeout, Duration repeat = Duration.zero)
+	{
+		assert(false, "TODO!");
+	}
+
+	override void stop(TimerID timer)
+	{
+		assert(false, "TODO!");
+	}
+
+	override bool isPending(TimerID timer)
+	{
+		assert(false, "TODO!");
+	}
+
+	override bool isPeriodic(TimerID timer)
+	{
+		assert(false, "TODO!");
+	}
+
+	override void wait(TimerID timer, TimerCallback callback)
+	{
+		assert(false, "TODO!");
+	}
+
+	override void cancelWait(TimerID timer)
+	{
+		assert(false, "TODO!");
+	}
+
+	override void addRef(TimerID descriptor)
+	{
+		assert(false, "TODO!");
+	}
+
+	override bool releaseRef(TimerID descriptor)
+	{
+		assert(false, "TODO!");
+	}
+}
+
+final class WinAPIEventDriverWatchers : EventDriverWatchers {
+@safe: /*@nogc:*/ nothrow:
+	override WatcherID watchDirectory(string path, bool recursive, FileChangesCallback callback)
+	{
+		assert(false, "TODO!");
+	}
+
+	override void addRef(WatcherID descriptor)
+	{
+		assert(false, "TODO!");
+	}
+
+	override bool releaseRef(WatcherID descriptor)
+	{
+		assert(false, "TODO!");
+	}
+}