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KohaUsers - Here’s a page for collecting some information about who’s using Koha. Hopefully it will help us (the developers) get in touch with the right people to ask questions of, and will help you (Koha users) to find other libraries running Koha in your local area. Note: these two groups aren’t mutually exclusive.
KohaInterestGroups - Here’s some information on starting a Koha Interest Group, and a list of current KIGs.
Koha Users and Developers of Open Source - Information about the beginnings of a US-based Koha User Group–working name Koha User & Developers of Open Source Group (KUDOS).
KohaLa - First meeting of the French not-for-profit Koha organisation: http://www.koha.org/about-koha/news/nr1193171525.html
Information that might be useful to translators (not specific to any language). There are also “translation help” pages in the French RessourcesTraducteurs, Chinese ChineseTranslationHelp and Dutch DutchTranslation sections.
The IRC channel at irc://irc.katipo.co.nz:6667/#koha is quite active, especially during US daytime on weekdays, though the geographic diversity of the community means that you can get support here almost anytime. The channel is logged, and logs are available at http://koha.org/cgi-bin/logs.pl.
In the past, we have held some IRC Meetings and have logs archived here.
To help you get to know some of the folks on IRC, we have a page listing some of the IRC Regulars.
There is also a #kohanews on Freenode
Some projects related to Koha:
the following links points to non-english pages.