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DebateArt.com - DebateArt is a unique and growing community committed to the idea of exchanging views and perspectives through debating.

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

Kialo - Kialo is the platform for rational debate. Empowering reason through friendly and open discussions.

Zendesk - Zendesk is a beautiful, lightweight help-desk solution.