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osTicket is a widely-used open source support ticket system. It seamlessly integrates inquiries created via email, phone and web-based forms into a simple easy-to-use multi-user web interface. Manage, organize and archive all your support requests and responses in one place while providing your customers with accountability and responsiveness they deserve.

Freshdesk is an award-winning, online help desk software that allows you to support customers over email, phone, the web or even through Twitter and your company's Facebook page. With Freshdesk there is nothing to download or install, you don't have to worry about server upgrades/patches and your agents can support customers from anywhere. Popular features include:

UseResponse is a fully customizable, customer feedback software and support ticketing system with open code that you can place on your server or use in cloud.It can be used as FAQ, ideas bank, bug tracking system, testimonials or all-in-one support software.4 Platforms: feedback with ideas, help desk with ticketing, knowledge base, live chat with messengers

UserVoice communities are the easiest way to turn customer feedback into action: 1. Share ideas. 2. Vote up the best. 3. Respond, implement & repeat!Create Forum Free accounts & trials. Signing up in 60 seconds! UserVoice allows the customers to vote on feedback and ideas submitted in the customer community. There is a limit on the number of votes a user can spend at any given time.

User or customer feedback system with voting facility about proposals done by users. Similar function as the UserVoice system.

Zammad is a web based open source helpdesk/customer support system with manyfeatures to manage customer communication via several channels like telephone,facebook, twitter, chat and e-mails. Do you receive many e-mails and want to answer themwith a team of agents?

Jitbit HelpDesk is helpdesk software that has same price for ANY number of technicians. And it has everything a help-desk needs: 2-way email integration, asset tracking, knowledge base, file attachments and more.

ClickDesk offers a magic box of live chat, voice chat, help desk and social toolbar for websites. ClickDesk is cloud-based; not needing users to download or install any software. Agents receive chats on their favorite IM such as Skype and Google Talk.The built-in voice chat functionality allows visitors to call businesses through Browser phone, Skype or the Local Access numbers available in 40 countries. The ClickDesk interface also includes a first-of-its kind social toolbar, enabling users to Tweet or like a Facebook page right from the chat window. ClickDesk recently launched an easy-to-use Help desk feature for businesses to efficiently manage support e-mails and offline chat messages; making it a complete multi-channel communication solution. »

Give a chance to your customers to call you in 8 seconds. No advertising. This is a new communication standard between customer and a company. It is difficult to express in words how great it works. Press the button in the right and just feel it.

Helpy is written in Ruby on Rails 4.2 and released under the MIT license. Features include support tickets with email integration, community discussions, multilingual knowledge base and more:

OneDesk is an on-demand software made to facilitate services delivery and product development collaboration. It is aimed at a broad spectrum of small to enterprise-sized businesses. The core applications include:

OpenSupports is an open source ticket system. It allows you to manage the inquiries of your customers by using tickets that you or your staff will answer. You can use a user system allowing only registered users to create tickets or don't use it and allow anyone to create tickets. You can also provide documentation called "articles" for faqs and how-to guides.

Inforobo engages your website visitors in automated conversations with the virtual assistant chatbot by simply chatting or talking with it. The virtual agent acts as a guide, providing answers, guiding customers in their shopping decisions, and seamlessly escalating your sales. Inforobo's artificial intelligence also provides the front-line support so that your customer service staff can concentrate on more complex tasks.

BusyBench is a management platform for small to mid-sized computer repair shops and IT professionals.