PDFerret

High performance file syncing and sharing, with also Markdown WYSIWYG editing, Wiki, file label and other knowledge management features.

Athens is no longer maintainted. Athens was an open-source, collaborative knowledge graph, backed by YC W21

Snips Python library to extract meaning from text

Mobile first Note Taking integrated with Git

The knowledge tinkerer's notebook

mrdoc,online document system developed based on python. It is suitable for individuals and small teams to manage documents, wiki, knowledge and notes. 觅思文档，适合于个人和中小型团队的在线文档、知识库系统。

Application for Mind Mapping, Knowledge Management, Project Management. Develop, organize and communicate your ideas and knowledge in the most effective way.

MITIE: library and tools for information extraction

Thinking notebook and Markdown editor.

Chinese Named Entity Recognition with IDCNN/biLSTM+CRF, and Relation Extraction with biGRU+2ATT 中文实体识别与关系提取