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
Dux Soup - Dux-Soup is a lead generation tool for LinkedIn.
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
BuzzBuilder - BuzzBuilder is a web-based lead generation tool that manages targeted email marketing campaigns and generates B2B sales leads.
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.