NoteKit

This program is a structured notetaking application based on GTK+ 3. Write your notes in instantly-formatted Markdown, organise them in a tree of folders that can be instantly navigated from within the program, and add hand-drawn notes by mouse, touchscreen or digitiser.

Screenshot

We have a Discord server and a bridged Matrix space for questions and discussing the project's development.

Why?

I figured it would be nice to have a free-software, platform-independent OneNote. While there is a remarkable number of free (speech or beer) notetaking applications out there, to my best knowledge, none of them simultaneously check the following boxes:

note organisation
text as a first-class object
formatting
simple, standard on-disk format
tablet input

How to install

The automated builds are by far the most up-to-date and should generally be as stable as any of the builds, although they are naturally less tested.

Linux x86_64 deb (compatible with Ubuntu 18.04 and likely later versions)
Linux x86_64 generic tar.gz (untested on non-Debian systems; for those, the distro-specific repositories below might be better)
Windows x86_64 (select the top entry and download the artifact; may require you to log into Github)

Moreover, there is also

an Open Build Service package, which provides up-to-date packages for many distributions, including Arch Linux, Debian, Ubuntu, CentOS 8, Fedora, SLE and OpenSuSE (thanks to @sp1ritCS);
a Fedora package (thanks to @LyesSaadi);
a now significantly outdated Launchpad PPA with a DEB package for Ubuntu 18.04 and many other modern Debian-family systems.

The following older binary builds are also available:

Linux x86_64 (Git version of 2021-04-03)
Windows x86_64 (Git version of 2020-04-22)

To run the binary, you will in addition require at least the following packages: libgtkmm-3.0-1v5 libgtksourceviewmm-3.0-0v5 libjsoncpp1 zlib1g libxml2, where the version of libgtkmm-3.0-1v5 is at least 3.20. (In particular, this means that Ubuntu 16.04 LTS (xenial) and derived distributions are too old.) If the binary does not work for you, it is recommended that you build from source, as described below.

How to build from source

Building with meson

Invoke meson _build followed by ninja -C _build to compile NoteKit. You can then install NoteKit by invoking meson install -C _build (If you don't have polkit running, you'll need to execute it as uid 0).

Required dependencies (pkg-config names):

gtkmm-3.0
gtksourceview-3.0
zlib
fontconfig
jsoncpp
clatexmath*

* If clatexmath is not installed, meson will automatically build it too (you'll need the additional tinyxml2 dependency). If you do not want cLaTeXMath, you can give meson the -Dclatexmath=false option.

Building with cmake

Either invoke cmake . followed by make (which will build a binary at cmake-build-Release/output/notekit), or get CodeLite, open and build the workspace.

Required libraries:

cmake.
libgtkmm-3.0-dev>=3.20 (UI stuff)
libgtksourceviewmm-3.0-dev>=3.18 (more UI stuff)
libjsoncpp-dev ~ 1.7.4 (config files; older versions may work)
zlib1g-dev
libfontconfig1-dev ~ 2.13 (to use custom fonts)

If you want to enable LaTeX math rendering support, you moreover need:

Set the CMAKE variable HAVE_CLATEXMATH to ON.
Run install-clatexmath.sh to clone cLaTeXMath into a subfolder and build it as a static library.
If you observe linker errors, make sure your gcc is sufficiently new.

For older LaTeX math support using lasem, you can proceed as follows:

Set the CMAKE variable HAVE_LASEM to ON.
Have checked out and compiled lasem from git in the CMAKE variable LASEM_PATH (default: ./lasem). (Remember to build it; just checking out is not enough.)
libxml2-dev ~ 2.9 (older versions may work)

Development and testing was exclusively conducted on X11-based Linux. The one tested way of building on Windows involves MSYS2's mingw-w64 package family (following the cmake route outlined above). Since MSYS2's coreutils depend on its Cygwin fork, the released Windows binary packages instead include a subset of coreutils from GnuWin32.

Development environment with meson

If you want to hack on NoteKit, you can use the meson provided devenv to avoid having to install NoteKit each time you changed something. To make use of the devenv you need to invoke meson devenv -C _build after configuring. You can then build NoteKit simply by invoking ninja without any further parameter and launch NoteKit afterwards by simply invoking notekit. (Please note, that you will want to use meson >= 0.59.0) To exit out of the environment send an EOF to the shell (<Ctrl>D) or type exit.

Installation notes

By default, configuration is saved in $HOME/.config/notekit, and notes are in $HOME/.local/share/notekit. This may depend on your $XDG_ environmental variables, and the notes base path can be changed in the config.json file in the configuration folder.
Resources (data/ and sourceview/) are searched in /notekit/ under $XDG_DATA_DIRS (default: /usr/local/share:/usr/share), followed by the current working directory .. If packaging Notekit or otherwise preparing it for system-wide installation, these two folders should probably be copied into /usr/share/notekit/data and /usr/share/notekit/sourceview respectively.

Usage notes

Note management

To create a new note, doubleclick a + node in the tree view and enter a name.
To create a new folder, doubleclick a + node in the tree view and enter a name ending in /, e.g. new folder/.
Notes will be sorted alphabetically.
You can move notes and whole folders between folders by dragging and dropping.
Files are saved automatically when the window is closed, when a different file is opened, and after a timeout when no user action is performed.

Markdown

Some markdown features are unsupported as a stylistic choice or because of parser limitations. If you are feeling adventurous, you can adjust the markdown parser by editing the GtkSourceView language definition in sourceview/markdown.lang.
Add LaTeX math using single $ signs, e.g. $\int x dx$ .
Some markdown will be hidden ("rendered") unless your cursor is next to it.

Pen input

Drawings can currently only be deleted whole. (This will be fixed eventually.)
To edit the default colour palette, right-click any of the colour buttons on the right-hand toolbar.
Due to present limitations, drawing clears the undo stack.
When copypasting text into other applications, drawings will be automatically converted into data URL PNGs.

Syntax highlighting