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MongoDB Atlas runs apps anywhere
Deploy in 115+ regions with the modern database for every enterprise.
MongoDB Atlas gives you the freedom to build and run modern applications anywhere—across AWS, Azure, and Google Cloud. With global availability in over 115 regions, Atlas lets you deploy close to your users, meet compliance needs, and scale with confidence across any geography.
Books Organizer, an organizer for pdf files based on sqlite and with a built-in reader. Bring your favorite PDF pages all in one! Make your own extract pages from existing ones
Not a search engine but navigation routes within a research domain.
...The website should not be understood as a conventional search engine but as different ways to navigate within this knowledge (information and concept) network.
Each information is thoroughly formalized; the aim is not exhaustivity or information amount but rather information quality so as to ensure the best possible articulation within the existing network (quality of the network) and ensure the subject diversity so as to cover the field with robustness.