KeepNote is described by its author simply as
KeepNote is a note taking application that works on Windows, Linux, and MacOS X
KeepNote is started by creating a new notebook and then new page(s) within it. Each page can contain text of course, but images can be inserted (Edit—>Insert Image…) as well as screenshots (Edit—>Insert Screenshot…) and files (Edit—>Attach File…). For screenshots KeepNote Minimizes itself and in dragging the mouse one can choose a rectangular area for capture. Note that the aforementioned insertions work when in a page or when a page is visible or highlighted in the tree structure.
The notebooks are saved in a tree structure or hierarchy with a notebook as the root and page and sub pages within it. Search and replace is available across all notes or for the open/visible page. The usual text formatting and aligning options are present as well.
The View menu’s ‘View Note In File Explorer’ opens the highlighted or open notebook’s folder in an instance of Windows Explorer (or other alternative). ‘View Note In Text Editor’ opens up a page in Wordpad. In both ‘View Note In Web Browser’ and ‘Open File’ options the page is shown in Internet Explorer (and not in system’s default browser).
The Go menu adds navigation options to move between tree nodes (notebooks), individual pages, to expand or collapse notes and more.
The Tools menu is where the python prompt (KeepNote is implemented or written using PyGTK) and optional Spell Check features reside but the required GtkSpell is not cross platform (it is Linux only).
The help menu includes a link to the program’s preferences file, here one can play around and change settings such as ‘new_notebook_path’, the aforementioned browser used to open notes (by changing ‘Web Browser’ from ‘C:\Program Files\Internet Explorer\iexplore.exe’ to the path for Firefox, Google Chrome or other browser) and even change Windows Explorer to an alternative such Ac Browser Plus, FreeCommander or other (by changing ‘File Launcher’ from ‘explorer.exe’ to the (full) path of the chosen executable).
Notebooks or pages can be exported in HTML format and can be backed up and tarred as well.
KeepNote deserves top marks for ease of use and the convenient and many editable options it provides.