Guix

emacs-org-brain implements a variant of concept mapping in Emacs, using org-mode. An org-brain is a network of org-mode entries, where each entry is a file or a headline, and you can get a visual overview of the relationships between the entries: parents, children, siblings and friends. This visual overview can also be used to browse your entries. You can think of entries as nodes in a mind map, or pages in a wiki.