Accompany - Accompany platform integrates with email, contacts, social feeds and more to keep you informed on your professional connections.
Melissa Data Quality - Melissa helps companies to harness Big Data, legacy data, and people data (names, addresses, phone numbers, and emails).
Propeller CRM - Small business CRM with deep Gmail integration
CrankWheel - Insanely simple, enterprise-friendly screen sharing, free for individual use.
Streak - Manage customers inside Gmail
Denali (Cougar) - Denali (Cougar) is software develops leading on-premise accounting solutions for small to mid-sized businesses.