TestingOnEFI - GRUB Wiki. MAPPStack. Home. Download Relations 1.0.0 for Mac - Relations is a free and open source tool for knowledge management. Relations is a free and open source tool for knowledge management. Relations is a combination of a personal Wiki and an electronic slip box. Relations will allow you to easily create items of three types (texts, terms, and persons) and set them in relation to other items already entered, thus creating a rich context for your items. Here are some key features of "Relations": Content is stored using three types of items: term items, text items and person items.The Relations application stores the content in a Derby database included in the out-of-the-box installation.