Directions for closing an account on an online service are often buried deep in a website and impossible to find. WikiCancel is a wiki page that lists the cancellation procedures for popular services, subscriptions and contracts.

Want to hunt down some useful references for an essay? Wondering which topics are popular in different Wikipedia categories? Fancy seeing Wikipedia articles represented on Google Maps? TheFullWiki, a set of Wikipedia search and mining tools, has you covered.

One of the tried and true best ways to study and retain information is to re-write the content - whether it be lecture notes, textbook facts and figures, or whatever - down again on paper. We can do one better than that, can't we?

Windows: If you've forgone installing a Wiki because configuring and running your own web server seemed like a pain, DokuWiki on a Stick packs DokuWiki into a tiny and portable package perfect for USB drives and Dropbox folders.

Feel like you're sending the same instructions, procedure checklists or other basic communications around the office time and again? Save yourself time and trouble by setting up a workplace wiki.

Wikipedia's long-in-testing "new look" went official this week, with all users moved over to the cleaner, easier-to-use interface.

The free MediaWiki software is best known for powering Wikipedia, but you don't have to be writing an encyclopaedia to put it to good use. Extend, skin and customise MediaWiki to create any kind of easy-to-update, collaborative web site.

Spotted a stupid typo or a factual error on Wikipedia? Don't just laugh or say "that proves you can never trust the Internet" -- get in and correct it yourself.

If you're a frequent surfer of the mass-edited encyclopedia, now would be a good time to register for a user account. With it, you can enable Wikipedia's new beta skin/theme, which gives a slicker feel to reading and editing.

Luminotes, a personal wiki in the vein of PBWiki or TiddlyWiki but with a focus on helping beginners get started, has made its portable wiki package and desktop clients free and open source for all.

Since opening up last July, Google's Wikipedia competitor Knol has attracted more than 100,000 entries. While that's an impressive number, it's well and truly dwarfed by Wikipedia's 2.7 million English-language articles. And while Knol's "moderated edits" model might mean that there are fewer visible edit wars, there are still plenty of unsourced, rambling and opinionated articles which wouldn't survive five minutes at Wikipedia (check out superman of calculated happiness for just one example). 100,000th Knol published

Linux.conf.au in Hobart is less than two months away, so it's good news that the conference wiki is now up and running. If Hobart locals could add information on dining, entertainment and public transport, offshore visitors like me would really appreciate it! Linux.conf.au Wiki

Google's recently launched Wikipedia competitor Knol has just updated its search functionality (yeah, you'd think that's one area Google would have covered off right from the start). While the full set of Google keywords isn't yet supported, you can now do searches for exact phrases and OR options, select which parts of a given article to search through, and sort results on a variety of parameters.

Following a restricted beta which began last December, Google has made its Wikipedia competitor Knol open for general use. While Knol borrows the general concept of "anyone can contribute" common to most wiki projects, it has a slight twist, as Google's software engineers explain:With Knol, we are introducing a new method for authors to work together that we call "moderated collaboration." With this feature, any reader can make suggested edits to a knol which the author may then choose to accept, reject, or modify before these contributions become visible to the public. This allows authors to accept suggestions from everyone in the world while remaining in control of their content. After all, their name is associated with it!Knol is free to use, requires a Google account to sign in.

Web app Twine (currently in closed beta) attempts to bring social search and bookmarking tools to the wiki, which sounds like an interesting combination. The app offers personal or group knowledge management for sharing, organising and searching for information, includng bookmarks, images and videos.

Web Worker Daily wrote about Twine the other day, and described it like so:

"A 'twine' is similar to a wiki, in that it may be specific to a certain subject or project, can have multiple members, allows for permission-based updating, and supports moderation. You tag the content you add to Twine, but the twist is that it tags your content too, by using natural language processing to figure out what it’s about."

Twine is in private beta at the moment. However, I got in touch with Twine PR to find out if it would be a free or paid app. The word came back that Twine will always offer a free (ad-supported) basic version, as well as a subscription-based professional version. Good stuff.

 Twine for Personal Knowledge Managment but Not Yet