via factoryjoe: "Dreamwidth Studios is an Open Source social networking, content management, and personal publishing platform. Our mission in life is to make it easy for you to share the things you make, and easy to find the people who are making the things you want to enjoy."
Ever since Apple finally lifted the NDA covering the iPhone SDK, a small number of developers have started to open source their native iPhone apps.
via factoryjoe: "Finally, attractive and seamless user experience in geospatial web applications. The OpenGeo stack is a flexible set of open source components all built for interoperability."
via mrtopf: XMind -- a powerful, Java-based mind mapping and charting application -- has been open-sourced (it's free!) with version 3.0. While it's not my absolute top pick for mind mapping, it ranks up there. I did have a license for the paid version, and I can tell you that it packs plenty of punch. It has all of the extra features I like: boundaries, relationships, summaries, notes, markers, outline view, floating topics and more, as well as intuitive keyboard navigation for rapid-fire brainstorming.
via Pierro: Email, calendaring, address books, bulletin boards, instant messaging, and more … all in one tightly integrated server package. Unlike other open source groupware systems, all of Citadel's data stores are built-in. “Integrate-it-yourself” is a thing of the past.
High-performance, multiprotocol, multithreaded server engine
Web browser, telnet/SSH, local client software accessible
Standards-compliant e-mail built in: IMAP, POP3, ESMTP
Group calendaring and scheduling (GroupDAV and Kolab-1 compatible)
Built-in listserv (mailing list server)
Integrated server-side mail sorting and filtering. Users can choose between an easy-to-use web based rules editor, or the power of writing complex scripts using the industry standard Sieve language.
Support for push e-mail and mobile devices
Database-driven, single-instance message store
Built-in full text index for fast searching
Authenticated SMTP (no more tedious mucking about with POP-before-SMTP hacks!)
Multiple domain support
Built-in integration with perimiter email filtering technologies such as Realtime Blackhole Lists (RBL's) and SpamAssassin
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