Index: src/Makefile
==================================================================
--- src/Makefile
+++ src/Makefile
@@ -51,10 +51,11 @@
        OFMutableString.m		\
        OFMutableTarArchiveEntry.m	\
        OFMutableTriple.m		\
        OFMutableURL.m			\
        OFMutableZIPArchiveEntry.m	\
+       OFNotification.m			\
        OFNull.m				\
        OFNumber.m			\
        OFObject.m			\
        OFObject+KeyValueCoding.m	\
        OFObject+Serialization.m		\

ADDED   src/OFNotification.h
Index: src/OFNotification.h
==================================================================
--- src/OFNotification.h
+++ src/OFNotification.h
@@ -0,0 +1,113 @@
+/*
+ * Copyright (c) 2008-2021 Jonathan Schleifer <js@nil.im>
+ *
+ * All rights reserved.
+ *
+ * This file is part of ObjFW. It may be distributed under the terms of the
+ * Q Public License 1.0, which can be found in the file LICENSE.QPL included in
+ * the packaging of this file.
+ *
+ * Alternatively, it may be distributed under the terms of the GNU General
+ * Public License, either version 2 or 3, which can be found in the file
+ * LICENSE.GPLv2 or LICENSE.GPLv3 respectively included in the packaging of this
+ * file.
+ */
+
+#import "OFObject.h"
+
+OF_ASSUME_NONNULL_BEGIN
+
+/** @file */
+
+@class OFConstantString;
+@class OFDictionary OF_GENERIC(KeyType, ObjectType);
+
+/**
+ * @brief A name for a notification.
+ */
+typedef OFConstantString *OFNotificationName;
+
+/**
+ * @class OFNotification OFNotification.h ObjFW/OFNotification.h
+ *
+ * @brief An class to represent a notification for or from
+ *	  @ref OFNotificationCenter.
+ */
+OF_SUBCLASSING_RESTRICTED
+@interface OFNotification: OFObject <OFCopying>
+{
+	OFNotificationName _name;
+	id _Nullable _object;
+	OFDictionary *_Nullable _userInfo;
+}
+
+/**
+ * @brief The name of the notification.
+ */
+@property (readonly, nonatomic) OFNotificationName name;
+
+/**
+ * @brief The object of the notification. This is commonly the sender of the
+ *	  notification.
+ */
+@property OF_NULLABLE_PROPERTY (readonly, nonatomic) id object;
+
+/**
+ * @brief Additional information about the notification.
+ */
+@property OF_NULLABLE_PROPERTY (readonly, nonatomic) OFDictionary *userInfo;
+
+/**
+ * @brief Creates a new notification with the specified name and object.
+ *
+ * @param name The name for the notification
+ * @param object The object for the notification. This is commonly the sender
+ *		 of the notification.
+ * @return A new, autoreleased OFNotification
+ */
++ (instancetype)notificationWithName: (OFNotificationName)name
+			      object: (nullable id)object;
+
+/**
+ * @brief Creates a new notification with the specified name, object and
+ *	  additional information.
+ *
+ * @param name The name for the notification
+ * @param object The object for the notification. This is commonly the sender
+ *		 of the notification.
+ * @param userInfo Additional information for the notification
+ * @return A new, autoreleased OFNotification
+ */
++ (instancetype)notificationWithName: (OFNotificationName)name
+			      object: (nullable id)object
+			    userInfo: (nullable OFDictionary *)userInfo;
+
+/**
+ * @brief Initializes an already allocated notification with the specified
+ *	  name and object.
+ *
+ * @param name The name for the notification
+ * @param object The object for the notification. This is commonly the sender
+ *		 of the notification.
+ * @return An initialized OFNotification
+ */
+- (instancetype)initWithName: (OFNotificationName)name
+		      object: (nullable id)object;
+
+/**
+ * @brief Initializes an already allocated notification with the specified
+ *	  name, object and additional information.
+ *
+ * @param name The name for the notification
+ * @param object The object for the notification. This is commonly the sender
+ *		 of the notification.
+ * @param userInfo Additional information for the notification
+ * @return An initialized OFNotification
+ */
+- (instancetype)initWithName: (OFNotificationName)name
+		      object: (nullable id)object
+		    userInfo: (nullable OFDictionary *)userInfo
+    OF_DESIGNATED_INITIALIZER;
+@end
+
+OF_ASSUME_NONNULL_END

ADDED   src/OFNotification.m
Index: src/OFNotification.m
==================================================================
--- src/OFNotification.m
+++ src/OFNotification.m
@@ -0,0 +1,76 @@
+/*
+ * Copyright (c) 2008-2021 Jonathan Schleifer <js@nil.im>
+ *
+ * All rights reserved.
+ *
+ * This file is part of ObjFW. It may be distributed under the terms of the
+ * Q Public License 1.0, which can be found in the file LICENSE.QPL included in
+ * the packaging of this file.
+ *
+ * Alternatively, it may be distributed under the terms of the GNU General
+ * Public License, either version 2 or 3, which can be found in the file
+ * LICENSE.GPLv2 or LICENSE.GPLv3 respectively included in the packaging of this
+ * file.
+ */
+
+#include "config.h"
+
+#import "OFNotification.h"
+#import "OFDictionary.h"
+#import "OFString.h"
+
+@implementation OFNotification
+@synthesize name = _name, object = _object, userInfo = _userInfo;
+
++ (instancetype)notificationWithName: (OFNotificationName)name
+			      object: (id)object
+{
+	return [[[self alloc] initWithName: name object: object] autorelease];
+}
+
++ (instancetype)notificationWithName: (OFNotificationName)name
+			      object: (id)object
+			    userInfo: (OFDictionary *)userInfo
+{
+	return [[[self alloc] initWithName: name
+				    object: object
+				  userInfo: userInfo] autorelease];
+}
+
+- (instancetype)initWithName: (OFNotificationName)name object: (id)object
+{
+	return [self initWithName: name object: object userInfo: nil];
+}
+
+- (instancetype)initWithName: (OFNotificationName)name
+		      object: (id)object
+		    userInfo: (OFDictionary *)userInfo
+{
+	self = [super init];
+
+	@try {
+		_name = [name copy];
+		_object = [object retain];
+		_userInfo = [userInfo copy];
+	} @catch (id e) {
+		[self release];
+		@throw e;
+	}
+
+	return self;
+}
+
+- (void)dealloc
+{
+	[_name release];
+	[_object release];
+	[_userInfo release];
+
+	[super dealloc];
+}
+
+- (id)copy
+{
+	return [self retain];
+}
+@end

Index: src/ObjFW.h
==================================================================
--- src/ObjFW.h
+++ src/ObjFW.h
@@ -47,10 +47,12 @@
 #import "OFDate.h"
 #import "OFUUID.h"
 #import "OFURL.h"
 #import "OFURLHandler.h"
 #import "OFColor.h"
+
+#import "OFNotification.h"
 
 #import "OFStream.h"
 #import "OFStdIOStream.h"
 #import "OFInflateStream.h"
 #import "OFInflate64Stream.h"