phpMyFAQ is a multilingual, completely database-driven FAQ system. It support various database systems and it also offers a content management system with a WYSIWYG editor, an image manager, flexible multi-group and multi-user support, a news system, user tracking, language modules, templates, PDF support, a backup system, Active Directory support, and an easy to use installation script.
LimeSurvey (formerly PHPSurveyor) is a Web application that interacts with MySQL, MSSQL, or Postgres to develop surveys, publish surveys, and collect responses to surveys. Once a survey has been created, data can be inserted into the survey either by a "pretty" public screen which presents each question one at a time, or by a quick and nasty data entry screen. It includes the capacity to generate individualized "tokens", so that invitations can be issued to participants. It also has the capacity to set conditions on whether questions will display (branching), numerous question types, and a basic statistics function.
Thunderbird is a total redesign of the Mozilla mail component to produce a cross-platform, stand-alone mail application using the XUL user interface language. It has many new features, among them the ability to customize your toolbars the way you want them. a new look and feel with a large number of downloadable themes which alter the appearance of the client, and the ability to add UI extensions.
miniBB is a flat, linear, highly customizable BB. It features MySQL, PostgreSQL, and MSSQL support, table name definitions, color skins, language packs, HTML templates, access control, smilies, search, basic BB codes, member titles and ranks, moderators, email notification, statistics, encrypted cookie logging, IP and user ID tracking and bans, spam protection, "sticky" topics, a powerful admin panel, and more.
MuseScore lets you notate and compose music easily with your keyboard, your mouse, or a MIDI keyboard. You can print beautifully engraved sheet music or export it as PDF or PNG. You can play your score, transpose it, and save it as audio or MIDI file. MuseScore also supports MusicXML to let you share your composition with other scorewriters. MuseScore is often advertised as a cost effective alternative for Sibelius and Finale.
CK-ERP is an accounting, educational, MRP, ERP, and CRM system that runs on top of multiple middlewares. It comprises 32 modules - Contact Management, Customer Relationship Management, Customer Self Service, Vendor Relationship Management, Material Requirement Planning, Warehouse, Inventory, Service, Accounting Ledger, Bank Reconciliation, Accounts Payable, Accounts Receivable, Purchase Order, Sales Order, Quotation, POS for Cashier, POS for Manager, Human Resources, Staff Self Service, Payroll, Administration, Internationalization, Access Control, Data Import, Teacher, Counsellor, Student, Applicant, Family, Registrar, Edu Administration, and Volunteer Management.
XWiki is a WikiWiki clone written in Java that supports many popular features of other Wikis like the Wiki syntax, version control, attachments, security, and searching, but also many advanced features like templates, database and dynamic development using scripting languages (Velocity, Groovy, Ruby, Python, PHP, and more), an extension system and skinability, J2EE scalability, an XML/RPC remote API, statistics, RSS feeds, PDF exporting, WYSIWYG editing, an Office viewer and importer, and a lot more.