movable type
Movable Type is a proprietary blog publishing system developed by California-based Six Apart. It is widely used, and supports most popular weblogging features, including user accounts, comments, TrackBacks, categories, and themes, and is extensible through a large library of third-party plug-ins. (The TrackBack feature was actually originated by Six Apart, and version 2.2 of Movable Type was the first weblog publishing software to include support for it.) Movable Type is free of charge for a single author, and paid licenses are available
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