PC-Duo Remote Control VS NeuQs Free Helpdesk

NinjaOne - NinjaOne (Formerly NinjaRMM) provides remote monitoring and management software that combines powerful functionality with a fast, modern UI. Easily remediate IT issues, automate common tasks, and support end-users with powerful IT management tools.

ServiceWise - Web based help desk management software

Plivo - Plivo simplifies your customer engagement.

Salesforce Service Cloud - Service Cloud integrates customer service with social networks and provides a self-service customer portal and knowledge base system.

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

HarmonyPSA - HarmonyPSA - Professional Services Automation (PSA) for IT Businesses