Nextcloud is an open source, self-hosted file share and communication platform. Access & sync your files, contacts, calendars & communicate and collaborate across your devices. You decide what happens with your data, where it is and who can access it!
One problem I faced personally is, that I have different doctors and through traveling and moving to another cities, every doctor has only a snippet of my medical data records. This can cause problems, due if Im sick and dont know the medical name for it, the doctor doesnt know about my health problems and so on. For that reason, and because the German Insurances and Doctor Software Supplier are unable to get something working, I decide to make my own health record to have the medical history on my side.
Perkeep (previously Camlistore) is a set of open source formats, protocols, and software for modeling, storing, searching, sharing and synchronizing data in the post-PC era. Data may be files or objects, tweets or 5TB videos, and you can access it via a phone, browser or FUSE filesystem.
Meemo is a personal data manager. It lets you simply input any kind of information like notes, thoughts, ideas as well as acts as a bookmarkmanager and todo list. The user interface resembles a news feed organized with tags. Full text search further allows you to quickly find information in your pile of accumulated data.
Solid is an exciting new project led by Prof. Tim Berners-Lee, inventor of the World Wide Web, taking place at MIT. The project aims to radically change the way Web applications work today, resulting in true data ownership as well as improved privacy.