KnolCase: personal and collaborative knowledge management

KnolCase is a collaborative case-based knowledge management tool for gathering information about subjects of interest and organizing these into case files. This can be used by researchers, investigators, journalists and others to collect, organize, share, and publish facts about topics. You can create your own case files with topics like persons, companies, organizations, places, articles, notes, documents, and references, and connect topics through properties, essentially forming a network of linked topics.

Ringggaard Research

Ringgaard Research ApS is a not-for-profit company that develops and maintains the SLING system as well as doing research relating to knowledge management and natural language processing. Ringgaard Research was founded in September 2020 by Michael Ringgaard after working at Google Research for more than 13 years.

KnolBase: a federated knowledge base

KnolBase is a federated knownledge base that contains approximately two billion facts about 100 million entities. Every day a new knowledge base is built from Wikidata as well as a number of other information sources.



SLING is an open source project under an Apache license and all the code is available on GitHub. SLING is written mostly in C++ but can be used from Python by using the SLING Python API (pysling). There is also a JS module so you can use SLING in the browser.


SLINGDB is a lightweight persistent key-value database with a HTTP interface. It can be installed independently of the other SLING components and is distributed as a standalone Debian package.


Myelin is a JIT compiler for neural networks. It compiles neural network functions written in Python into optimized x64 assembly or GPU code at runtime.