Fedena
Fedena is an open source school management software developed on the Ruby on Rails framework. It is a web 2.0 web application developed by Foradian Technologies. Fedena is cloud based school ERP software used in schools for administration purposes. Fedena is being used by the Education Department of Government of Kerala to automate the system, process of over 15, 000 schools in the state, is named as Sampoorna. Fedena is now used in more than 40, 000 institutions around the world. For the development, support of Fedena, Foradian won the MIT TR35 2012 India award for innovation in education domain. Fedena Pro is the commercial version of this software, comes with add-on modules, the premium modules.
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LiquidPlanner
LiquidPlanner, Inc. is an online project management software company based in Seattle. The firm was founded in 2006 and launched their first release to a public beta in 2008. LiquidPlanner is a platform-independent, online project management system which features ranged estimates to express the uncertainty in project schedules.
OpenProject
Web based project collaboration with open source Efficiently plan, steer, and communicate within your projects. With open source and open mind.
Redmine
Redmine is a free and open source, web-based project management and issue tracking tool. It allows users to manage multiple projects and associated subprojects. It features per project wikis and forums, time tracking, and flexible role based access control. It includes a calendar and Gantt charts to aid visual representation of projects and their deadlines. Redmine integrates with various version control systems and includes a repository browser and diff viewer. The design of Redmine is significantly influenced by Trac, a software package with some similar features.
Redbooth
Redbooth Developer Redbooth, Inc. Written in Ruby on Rails Operating system Cross-platform Available in Castilian, English Type Project management, Software as a service Website redbooth.com
Fat Free CRM - Ruby On Rails-based open source CRM platform
Fat Free CRM is an open source Ruby on Rails -based customer relationship management platform. Out of the box it features group collaboration, campaign and lead management, contact lists, and opportunity tracking.
bonsaiERP
XLsuite
XLsuite is an application suite designed using Ruby on Rails that provides a full stack CRM and ERP system.

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The loveliest image I know is Fra Angelico’s ‘Entry of the Blessed into Paradise’, a scene from his painting The Last Judgment of 1431. In it, the blessed, just risen from their graves, gather together in a flowering garden to join hands with angels and dance into the light of heaven.
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The Sage Group plc, commonly known as Sage, is a multinational enterprise software company headquartered in Newcastle upon Tyne, United Kingdom. It is the world's third-largest supplier of enterprise resource planning software, the largest supplier to small businesses, has 6.1 million customers worldwide. It has offices in 24 countries. The company is the patron of The Sage Gateshead music venue in Gateshead.
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