Voiceone
If you are bored of using freepbx or trixbox interface, try out this source forge based opensource webbased asterisk management interface, i just gave it a try and it looks promising. interface is much cooler than freePBX, you can create outbound and inbound rulesets,seems much like firewall rules 
They have an online demo as well, so you can try out the application and its functions.
Current version is 0.7.1. Voiceone requires Asterisk with mysql support and Php5+Apache. Following is a list of features from their website.
- Client/Server architecture based on web services
- Relies on Asterisk Realtime Architecture (ARA) for database storage
- Two different panels, Personal for users and Configurator for administrators
- Extensions management
- Fully customizable users profile, including Voicemail, Call Forwarding (“Follow Me“) and Do Not Disturb
- Highly configurable rulesets for outbound and inbound calls
- Static LCR (Least Cost Routing)
- Supports VoIP providers (SIP and IAX) and traditional Telco carriers
- Links remote offices via IAX with RSA public key encryption
- Powerful IVR creation system
- Queues management
- Conference rooms handling
- Sounds and Music On Hold management
- Applications and macros editor
- System Macros and Functions preloaded (DID/DDI, Call Back and DISA included)
- Plugins system to share ready-to-use macros and application with the VoiceOne community
- Powerful configuration of mISDN and Zap drivers based hardware
- Java SIP phone embedded
- I/O interface and PBX CLI (Command Line Interface)
- Static-like text editor for conf files
