Can be used for code projects or just simple business projects.

Here are some key features of "Arbit":

Modules:
· Issue tracker
· Wiki
· Code browser
· Notifications
· FAQ

Requirements:

· PHP 5.3 or higher
· Apache CouchDB 0.9 or higher

What's New in This Release: [ read full changelog ]

· Implemented #23: "Close issue" shortcut.
· Implemented #33: Integration of code metrics
· Implemented #43: Provide URI to affected objects in notifications emails
· Implemented #70: Config option for project specific email from and subject
· Implemented #78: Implement stored reports
· Implemented #82: Add support for feeds
· Implemented #86: Post issue reporting action
· Implemented: Basic cron infrastructure using periodic
· Implemented: Decoration of source with line based annotations
· Implemented: Simple metric overview on metrics generated by PDepend
· Implemented: Optionally show / hide all issues in roadmap
· Implemented: Base importer module
· Implemented: Redmine driver for the importer module
· Implemented: Configurable default values for new issues (type, state, ...)
· Implemented: Form protection using JavaScript to not leave a change form
· Implemented: Make writing of translation files optional and disabled by default.
· Fixed #77: Permission lost on import
· Fixed #81: Issue updates cause duplicates in search index
· Fixed #85: Cache size of source module metadata cache explodes
· Fixed #90: Unassigning task not possible
· Fixed #91: German Umlauts throw iconv notices, issues are not saved
· Fixed #95: A group can't have no permissions
· Fixed #97: Wiki-links to sub pages go to edit view of page even if page exists
· Fixed #98: Notification mails have US-ASCII encoding while containing UTF-8
· Fixed #99: Componets cannot have the same name
· Fixed #103: Namespace field not populated in wiki templates
· Fixed #109: Wiki looses edit summary on every input error
· Fixed #110: Wiki page title mustn't be editable
· Fixed #111: Whitespaces in wiki page titles break
· Fixed #114: CodeSniffer standard in example phpcs is #standards="Arbit", should be #standard="Arbit"
· Fixed #115: Exception when logging out
· Fixed #121: Unicode user names might break in importer script
· Fixed #122: Users have to be added in the Users group during import
· Fixed #123: Mails are always sent from default @example.org address
· Fixed #128: Using custom issue types/states breaks the overview charts
· Fixed #129: BaseUrl generation not compatible with Windows OS
· Fixed #130: Wrong revision links in diff view
· Fixed #131: svn - initial checkout - dont use config for user and pass
· Fixed #133: Inconsistent issue sorting breaks roadmap rendering
· Fixed #137: used Username by OpenID
· Fixed #152: Internal server error on wiki diff
· Resolved #120: Make arbit work with CouchDB authentication
· Resolved #40: Show issue resolution in issue index view