DEVELOPERS TOOLS & RESOURCES

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+ Blogs
+ Codecs 
+ Commercial SIP Products & Service Providers
+ Developers Programs and Community sites 
+ Free SIP and ENUM Services 
+ JAVA, JAIN, JSLEE, JSIP
+ Other Stacks, RTP Applications, code and bits and pieces
+ Robustness testing 
+ SIP and DNS
+ SIP Center links pages
+ SIP Client Software, User Agents, Source Code
+ SIP Drafts and RFC's
+ SIP Parsers and Stacks 
+ SIP Servers, Proxys and Gateways 
+ Testing Tools