Add note for Badabib

notebook/Tools/Badabib.md

@@ -0,0 +1,11 @@
+# Badabib
+> A basic BibTeX viewer and editor written in Python and GTK, using python-bibtexparser under the hood.
+
+-   View, edit, sort, filter, and search BibTeX databases
+-   View and edit BibTeX strings or import strings from external files
+-   Customizable editor layouts
+-   Shortcuts for common actions, such as protecting upper case letters or converting between unicode and LaTeX
+
+```sh
+flatpak install flathub com.github.rogercrocker.badabib
+```