Our weekly additions to the directory:

BirdHerd

BirdHerd is an easy and useful tool to add contributors to a single Twitter account. Just choose which other Twitter users should have the ability to tweet from the account. They will then be able to direct message the account and their DMs will appear in the timeline with a slash-via attribution system that lets users know who sent the tweet.

The team at BirdHerd have kindly given us a promo code to let you try out the service. Type in ‘jolicloud’ to create an account on BirdHerd.

Nirvana

Nirvana is a task management app based on David Allen’s book “Getting Things Done”. His well-known method of keeping organized is all about getting things out of your head and into a trusted system, then effortlessly drilling down to the thing you should be doing right now. You can tag, file, schedule and reorder tasks, and delegate by getting Nirvana to send an email on your behalf.

Simple app Ketchup will help you keep all your meeting notes in one place, and share them via public or private urls.

Stack Overflow

Stack Overflow is a free programming Q&A site that is collaboratively built and maintained by your fellow programmers. Posts can be anonymous, but registered users can earn reputation points by convincing other users that they know what they are talking about. Vote up helpful answers by clicking the upward pointing arrow to the left of your question.

Dealing with more general topics, Hunch is a decision making site that addresses your problem or question based on the collective knowledge of its community. Similarly, Quora is a collection of user-created questions and answers that aims to inspire a very broad range of contributors.

Topikality

Topikality is a topic tracking tool that gradually learns what sort of articles you like, and emails them to you. Users vote articles up and down, and once 50 votes have been put forth the service will start drawing comparisons to select and deliver more accurate content. You can subscribe to a feed of all the articles in you ‘topik’, and use email links to share articles you like.

Carbonmade

Carbonmade offers one of the easiest ways to display and manage your creative portfolio online. Its user interface is intuitive and humorous, and a free account will provide you with 5 projects to show and a total of 35 images. You can also update Flash content and video. Carbonmade is being used by over 184,000 designers and artists worldwide.

Pictaculous generates a colour palette from any uploaded image and lets you download an Adobe Swatch file to work with it. It doesn’t require registration.

Starviewer lets you peek at interesting and vivid sights in the night sky and In My Backyard estimates how much electricity you can produce through solar and wind power in your own backyard (providing it’s located in the US).

Other additions include top currency converter Oanda, award winning internet movie database IMDb, and lifestream aggregator Dipity.

Happy joliclouding!