Sitecore publishing Utils to quickly queue up a batch of items to a publish queue and publish the queue, as opposed to individual publishes which cause the publish:end event to fire multiple times (read: individual index updates, cache clearing, etc.)

PublishUtils.cs

public static class PublishUtils
{
    public static void CreateAndPublishQueue(Database sourceDatabase, Database[] targetDatabases, Language[] targetLanguages, IEnumerable<ID> itemIds, bool skipEvents = false, bool useSecurityDisabler = true)
    {
        Assert.IsNotNull(sourceDatabase, "sourceDatabase");
        Assert.IsNotNull(targetDatabases, "targetDatabases");
        Assert.IsNotNull(targetLanguages, "targetLanguages");

        var publishingCandidates = SetPublishingCandidates(sourceDatabase, targetDatabases, targetLanguages, itemIds);

        ProcessCandidates(sourceDatabase, targetDatabases, targetLanguages, publishingCandidates, skipEvents, useSecurityDisabler);
    }

    private static List<PublishingCandidate> SetPublishingCandidates(Database sourceDatabase, Database[] targetDatabases, Language[] targetLanguages, IEnumerable<ID> itemIds)
    {
        var publishingCandidates = new List<PublishingCandidate>();

        foreach (var itemId in itemIds)
        {
            publishingCandidates.AddRange(CreatePublishingCandidatesFromItemId(sourceDatabase, targetDatabases, targetLanguages, itemId));
        }

        return publishingCandidates;
    }

    public static List<PublishingCandidate> CreatePublishingCandidatesFromItemId(Database sourceDatabase, Database[] targetDatabases, Language[] targetLanguages, ID itemId)
    {
        if (sourceDatabase == null)
        {
            Log.Info("sourceDatabase == null", new object());
            return Enumerable.Empty<PublishingCandidate>().ToList();
        }
        if (targetDatabases == null)
        {
            Log.Info("targetDatabases == null", new object());
            return Enumerable.Empty<PublishingCandidate>().ToList();
        }
        if (targetLanguages == null)
        {
            Log.Info("targetLanguages == null", new object());
            return Enumerable.Empty<PublishingCandidate>().ToList();
        }
            
        var publishingCandidates = new List<PublishingCandidate>();

        var item = sourceDatabase.GetItem(itemId);

        if (item == null)
        {
            Log.Info("item == null", new object());
            return Enumerable.Empty<PublishingCandidate>().ToList();
        }

        foreach (var publishingTargetDatabase in targetDatabases.Where(tDb => tDb != null))
        {
            foreach (var publishingTargetLanguage in targetLanguages.Where(lang => lang != null))
            {
                var publishOptions = new PublishOptions(
                    Database.GetDatabase("master"),
                    publishingTargetDatabase,
                    PublishMode.Full,
                    publishingTargetLanguage,
                    DateTime.Now)
                {
                    CompareRevisions = false    
                };

                publishingCandidates.Add(new PublishingCandidate(itemId, publishOptions));
                Log.Info($"Added item {item.Paths.FullPath} to the publish queue, target language: {publishingTargetLanguage}, targetDatabase: {publishingTargetDatabase}", new object());
            }
        }

        return publishingCandidates;
    }

    public static void ProcessCandidates(Database sourceDatabase, Database[] targetDatabases, Language[] targetLanguages, List<PublishingCandidate> publishingCandidates, bool skipEvents = false, bool useSecurityDisabler = true)
    {
        Assert.IsNotNull(sourceDatabase, "sourceDatabase");
        Assert.IsNotNull(targetDatabases, "targetDatabases");
        Assert.IsNotNull(targetLanguages, "targetLanguages");

        Log.Info($"{publishingCandidates.Count} items added to publish queue", new object());

        var triggerDatabase = targetDatabases.First();
        var triggerLanguage = targetLanguages.First();

        var defaultPublishOptions = new PublishOptions(
                sourceDatabase,
                triggerDatabase, // need to pass database to satisfy contructor
                PublishMode.Full,
                triggerLanguage, // need to pass language to satisfy contructor
                DateTime.Now)
        {
            CompareRevisions = false   
        };

        var publishContext = PublishManager.CreatePublishContext(defaultPublishOptions);

        // required or null exception thrown
        publishContext.Languages = targetLanguages;

        publishContext.Queue.Add(publishingCandidates);

        if (skipEvents)
        {
            var queue = new ProcessQueue();
            Log.Info("Processing Publish Queue, skipEvents = true", new object());

            if (useSecurityDisabler)
            {
                Log.Info("Processing Publish Queue, security disabled", new object());
                using (new SecurityDisabler())
                    queue.Process(publishContext);
            }
            else
            {
                Log.Info("Processing Publish Queue, security enabled", new object());
                queue.Process(publishContext);
            }
        }
        else
        {
            Log.Info("Processing Publish Queue, skipEvents = false", new object());

            if (useSecurityDisabler)
            {
                Log.Info("Processing Publish Queue, security disabled", new object());
                using (new SecurityDisabler())
                    CorePipeline.Run("publish", publishContext);
            }
            else
            {
                Log.Info("Processing Publish Queue, security enabled", new object());
                CorePipeline.Run("publish", publishContext);
            }
            Log.Info("Raising publish:end event", new object());
            global::Sitecore.Events.Event.RaiseEvent("publish:end", new Publisher(defaultPublishOptions));
            Log.Info("Raising publish:end:remote event", new object());
            global::Sitecore.Events.Event.RaiseEvent("publish:end:remote", new Publisher(defaultPublishOptions));
        }
        Log.Info("Finished processing Publish Queue", new object());
    }
}

Note: this will also publish the top level sitecore item.