The Jaiku API is available for non-commercial use by outside developers. Commercial use is possible by prior arrangement.

IM Connectivity

IMified

IMified's Jaiku widget enables posting to Jaiku from AIM, MSN, GTalk/Jabber, Yahoo (Yahoo is offline at time of posting this). The Jaiku+Twitter widget enables posting to both services at once.
http://imified.com

Anothr

An IM bot that allows you to read RSS feeds, including ones from Jaiku.
http://anothr.com/

Web Applications

Posting and Browsing Jaikus

Jaiku Gadget for Google Home Page

Add this Gadget to your Google Home Page to start posting Jaikus and browsing the latest entries from your Jaiku Overview. By Rick Measham.
http://code.google.com/p/jaikugadget/

TwitKu

A simple web app that lets you monitor your Jaiku and Twitter accounts on a single page. By Douglas J. Nakakihara.
http://twitku.com/

Search and Trend Tracking

MobiFeedLive

A trend-tracking and keyword search service that tracks Jaiku and Twitter and generates reports on what people are mentioning, linking to, and comparing. Also offers Email alerts for keywords.
http://www.mobifeedlive.com/

Desktop Applications

Mac OSX

Juhu

A Mac OSX client for Jaiku. Enables posting Jaikus and adding icons. Displays the latest Jaiku from the user's Overview.
http://juhu-mac.blogspot.com/

Jaiku dashboard widget for Mac OS X

A Max OSX widget that enables posting Jaikus and setting one's location
http://www.exove.com/blog/2007/04/24/jaiku-widget-for-mac-os-x/

Twaiku

Bwana McCall's combination of the Twitter/Jaiku Growl/Quicksilver Plugin by Phil B., Jaiku (plazeless) plugin by Tijs Teulings, Twitter/Growl script by Ted Leung, and Plazes (by Tijs) / IM code merged in by Olof Werngren.
http://code.google.com/p/twaiku

JaikuGrowler

An AppleScript that allows you to receive alerts from Growl whenever you or any of your Jaiku contacts emit a new Jaiku. By Peter Rukavina.
http://ruk.ca/wiki/JaikuGrowler

Jaiku-Plazes Quicksilver Script

A Quicksilver script to let you update from Quicksilver, works with Plazes to set your location (though it isn't required). By Tijs Teulings.
http://blog.tijs.org/archives/2007/03/14/quicksilver-plugin-for-jaiku-using-plazes/

Windows

Jaikuroo

A Windows client that enables you to post Jaikus and browse the latest updates from yourself, your contacts, or everyone. Also enables you to view comments, add icons to your posts, and set your location. Includes built-in URL shortening, customizable look, as well as auto-refreshing and alerts. By RareEdge Design Group.
http://rareedge.com/jaikuroo/

Jay-Q

A Windows client for Jaiku with a built-in spell checker, ability to post comments, and auto-updating of entries. By Jeremy Brown.
http://www.threebluedots.com/jayq/

Sideku

Sideku is a Windows Vista gadget that enables posting and browsing Jaikus from the Windows Vista Sidebar interface. By Patrick Jakubowski.
https://netfiles.uiuc.edu/pjakubo2/www/sideku/index.html

Linux

Nitwit

Desktop application for GNU/Linux, Windows and Mac OS X. Works across many protocols like Jaiku, Twitter, Jabber and IRC. Multilanguage (french, english and more to come)
http://nitwit.waglo.com/

Mobile Applications

Java

Jaiku Moblet

A mojax moblet to directly interface with Jaiku through the Jaiku API
http://mojax.mfoundry.com/display/mojax/Jaiku+Moblet+in+24hrs

Blackberry

JaikuBerry

Enables posting Jaikus and fetches the latest entries from the user's Overview and 'Your Jaikus'. by Richard Todd.
http://www.movethemarkets.com/richard/2007/05/10/jaikuberry-05/

Symbian

Jaiku Mobile for Nokia S60

Enables posting Jaikus and browsing latest updates from your contacts, as well as sharing availability, location, calendar, and nearby people. By Jaiku Ltd.
http://jaiku.com/mobile

Blog Applications

Jaiku Wordpress plugin

This plugin enables you to both display your Jaiku updates as well as post to Jaiku directly from your Wordpress blog. By Douglas Karr.
http://www.douglaskarr.com/projects/jaiku-plugin/

Virtual World Applications

Second Life

Squawk

A Second Life interface. By Evan Sims.
http://www.squawknest.com/