OpenSER is a collaborative project focused on the development of a secure and extensible SIP Proxy, Registrar and Presence server to provide modern communications services. It is written in pure C, is highly customizable and modular allowing for new developments in a cost effective manner.

SIP Thor is a Peer-to-Peer overlay that allows for load balancing, self-organization and geographical distribution of resources. The Peer-to-Peer overlay provides Multimedia Service Platform with the primitives for self-organization, high availability and scalability.

NGNPro is a SOAP/XML provisioning server that manages the addition, modification and deletion of entities like customer information, SIP domains, SIP accounts and SIP aliases on OpenSER Proxy/Registrar, voicemail boxes on Asterisk, ENUM ranges and numbers on Power DNS server and rating plans on CDRTool rating engine.

MediaProxy is a media relay for RTP/RTCP and UDP streams that works in tandem with OpenSER to provide NAT traversal capability for media streams from SIP user agents located behind NAT.

CDRTool is an Open Source solution that provides mediation, accounting and tracing for Call Detail Records enerated by OpenSER by using RADIUS protocol and OpenSER siptrace facility.

OpenXCAP is an Open Source, easy extensible, fully featured XCAP server with TLS security and support for multiple realms.

ENUM is a protocol that provides a translation mechanism for E.164 telephone numbers into IP addressing schemes. Based on standards endorsed by IETF (Internet Engineering Task Force) and ITU (International Telecommunication Union), ENUM is the key ingredient of the convergence between PSTN and Internet.