Versatile: You can strip down to a core system, or build up with 3rd-party addons.

Full API documentation

High coding standards: No PHP notices. Type-strict codebase. MVC framework.

Free online developer's guide book (in the tutorials)

Custom field filters: For example, restrict news posts to a minimum length.

Stack traces for easy debugging

Synchronise data between staging and live sites using Resource-fs

Breadcrumb overrides

Advanced banning: Set your own banning rules for different hack attack codes. Even create your own ban pages (e.g. to mimic law enforcement bans for spammers).

Code overrides: Implement modifications to the Composr code without directly editing the original code by creating _custom files. This makes upgrading much easier. Also supports contentious_overrides hooks and the override_api for more advanced overriding.

Many different hook types allowing for modifying or extending Composr without modifying or overriding the code.

Convert from other software: See our importing tutorial for a list of importers.

Use an existing member system: See our download page for a list of forum drivers.

Convert an HTML site into Composr pages

LDAP support for corporate networks (Conversr only)

HTTP authentication: Tie into an existing HTTP authentication-based login system (Conversr only)

Proxying system: Programmers can integrate any existing scripts using our sophisticated proxying system (which includes full cookie support).

Minimodules and miniblocks: Programmers can port existing PHP code into Composr itself without having to strictly conform it to Composr's framework

Automatically create newsletter issues highlighting your latest content

Double opt-in: Prevent false sign-ups by asking subscribers to confirm their subscriptions.

Host multiple newsletters: Visitors can subscribe to the ones they want.

Flexible mailings: Send out mailings to all members, to different usergroups, or to subscribers of specific newsletters.

Welcome e-mails: Send multiple welcome e-mails to new users automatically, on a configurable schedule (Conversr-only).

Bounce cleanup: Automatically clean out bounces from your e-mail list.

Unsubscribe: Recipients can easily unsubscribe from newsletters through an unsubscribe link provided in the e-mail.

Change settings: Newsletter subscribers can change their subscription settings on-site.

Drip sending: Prevent overwhelming your mail server or outbound limits.

Choose what is searchable

Boolean and full-text modes

Keyword highlighting in results

Search boxes to integrate into your website

Logging/stats

OpenSearch support: Allow users to search from inside their web browser.

Results sorting, and filtering by author and date

Search within downloads: Including support for looking inside archives.

Composr fast custom index: Support full-text searches in instances where your database does not

Multiple types: Each one can specify its own width-by-height (e.g. skyscraper).

Smart banners: Integrate text-banners into your content via keyword detection.

Broad media compatibility: Image banners, external banner rotations, and text banners.

Determine which banners display most often

Run a cross-site banner network

Hit-balancing support: A site on a banner network gets as many inbound hits as it provides outbound clicks.

Targeted advertising: Show different banners to different usergroups.

Track banner performance

Use the banner system to display whole sets of sponsor logos or partners

Supports Geotargeting

Periodic content reviews: Reminders to check (or remove) banners

Quick installer: Our self-extractor allows faster uploads and will automatically set permissions.

Wizard-based installation

Auto-scans for compatibility problems: Be informed of problems before installing

Get your site up and running in just a few minutes

Keep your site closed to regular visitors until you're happy to open it

Configures server: Automatically generates an htaccess file for you (for Apache).

Auto-detection of forum settings for easy integration

Install test content

Add virtually unlimited pages to your site

WYSIWYG editor (powered by CKEditor)

Convenient edit links: Staff see “edit this” links at the bottom of every page.

PHP support: Upload your PHP scripts and run them inside Composr (may require adjustments to the script code).

Hierarchical page structure: Supports parent and child pages

Periodic content reviews: Helping you ensure ongoing accuracy of your content.

Add Comcode pages (the default) or static HTML pages

Supports revisions and revision control systems (such as git); add new pages as files, and Composr will automatically register them in its system.

Clear organisation: Uses a tree structure for unlimited categorisation.

Anti-leech protection: download links contain a session ID

Community-centred: Allow users to comment upon and rate downloads

Many ways to add new files: Upload files. Link-to existing files. Copy existing files using a live URL. Batch import links from existing file stores.

Author support: Assign your downloads to authors, so users can find other downloads by the same author.

Set licences: Make users agree to a licence before downloading.

Images: Show images along with your downloads (e.g. screen-shots) (this implicitly uses galleries).

Basic file versioning support

Control monthly bandwidth use site-wide

Think “structured wikis”.

Create an encyclopaedic database for your website

Use a tree-structure or traditional cross-linking

Supports revisions: Track changes

Display the tree structure of your entire Wiki+

Allow users to jump in at random pages

Make your pages either wiki-style or topic-style

Allow members to contribute to Wiki+ pages by adding Wiki+ posts

Run a competition: Choose winners randomly from those who passed the quiz.

Surveys: Gather data and find trends.

Tests: Test members' knowledge on a variety of topics.

Cheat prevention: Settings to prevent cheating, such as time limits, question / answer shuffling, and re-testing rules.

Integration with points: Charge points to enter a competition, or award points for winning.

Member blogs: Allow members to have their own blogs on their profile

RSS and Atom support: Export and import feeds.

Trackback support: Send and receive trackbacks.

Scheduled publishing

Ping support and RSS Cloud support

Multiple news categories and filtering

Multiple ways to integrate news into your website

Import from RSS feeds

Supports geotargeting

Members can rate and comment on news articles and blog posts

Send out a news article as a newsletter

Day/week/month/year views

Advanced “recurring event” settings

Event subscriptions: Receive reminders and notifications by event or event type

Warnings about conflicting events

Microformats support

Integrate a calendar month view, or an upcoming events view, onto your design

Supports categories: Have multiple event types

Multiple time zones: Have different events in different time zones with configurable conversion settings.

Priority flagging: Choose between 5 priorities

Programmers can even use the calendar to schedule custom tasks (Commandr) to be run

RSS and Atom support: Export support, but also support for overlaying news feeds onto the calendar.

Supports geotargeting

Feedback: Allow members to comment and rate events. Segregate feedback on recurring events by date.