Atomogy offers high-ROI professional software
services including custom software development, architecture
consulting, codebase management, system maintenance, technology
evaluation, performance tuning, business analysis, information
schema design, da
20 Million businesses.OpenSource Business Diectory provides, US business data complete with address , contact name, email, phoen and fax.
The data is free to view and free to export.
OpenDJ is a REST & LDAP Directory - high performance, highly available, secure directory server, built-in data replication, client tools, and an LDAP SDK.