Freshdesk - Freshdesk is a cloud-based customer support software that lets you support customers through traditional channels like phone and email, social channels like Facebook and Twitter, and your own branded community
PersistIQ - It takes multiple touch points before a lead engages. PersistIQ automates the tedious parts while preserving the key human elements of sales
UseResponse - Open-source, self-hosted customer feedback software, live chat and helpdesk system that you can install on your server. Organize documentation using knowledge base and get feedback from social networks with centralized system
Dux Soup - Dux-Soup is a lead generation tool for LinkedIn.
Zendesk - Zendesk is a beautiful, lightweight help-desk solution.
CloudSponge - Companies from every industry use CloudSponge’s Contact Picker to get access to their users’ address books.