Addressify - Addressify is an API that allows developers to implement address verification, validation and autocomplete for Australia in their apps.
Melissa Data Quality - Melissa helps companies to harness Big Data, legacy data, and people data (names, addresses, phone numbers, and emails).
Smarty - Smarty provides address validation, autocomplete, geocoding and reverse geocoding services covering addresses in over 240+ countries.
CrankWheel - Insanely simple, enterprise-friendly screen sharing, free for individual use.
Experian Address Verification API - Experian provides Address Verification API for accurate, complete USPS addresses with minimal data entry.
Denali (Cougar) - Denali (Cougar) is software develops leading on-premise accounting solutions for small to mid-sized businesses.