These are links to the source code for open source libraries.

- GEOS: <http://download.osgeo.org/geos/geos-3.6.3.tar.bz2>
- GCC: <https://github.com/gcc-mirror/gcc>
- gpg-error: <https://www.gnupg.org/ftp/gcrypt/libgpg-error/libgpg-error-1.32.tar.bz2>
- libidn: <https://ftp.gnu.org/gnu/libidn/libidn2-2.0.5.tar.gz>
- gstreamer: <https://github.com/gstreamer/gstreamer>
- gst-plugins-core: <https://github.com/gstreamer/gst-plugins-base>
- gst-plugins-good: <https://github.com/gstreamer/gst-plugins-good>
- gst-plugins-bad: <https://github.com/gstreamer/gst-plugins-bad>
- glibc: <https://ftp.gnu.org/gnu/glibc/>
- glib: <https://github.com/GNOME/glib>
- Qt:
    - <https://github.com/qt/qtbase>
    - <https://github.com/qt/qt5>
- Graphite 2: <https://github.com/silnrsi/graphite>
- util-linux: <https://git.kernel.org/pub/scm/utils/util-linux/util-linux.git>
- pango: <https://gitlab.gnome.org/GNOME/pango/>
- libthai: <https://github.com/tlwg/libthai>
- libdatrie: <https://github.com/tlwg/libdatrie>
- libatspi: <https://github.com/GNOME/at-spi2-core/tree/master/doc/libatspi>
- GTK:
    - <https://github.com/GNOME/gtk>
    - <https://github.com/GNOME/atk>
- cairo: <https://cgit.freedesktop.org/cairo/>
- libudev: <https://github.com/systemd/systemd/tree/master/src/libudev>
- libgudev: <https://github.com/GNOME/libgudev>
- libsystemd: <https://github.com/systemd/systemd/tree/master/src/libsystemd>
- libgcrypt: <https://github.com/gpg/libgcrypt>
- glib-networking: <https://gitlab.gnome.org/GNOME/glib-networking/>
- dconf: <https://download.gnome.org/sources/dconf/>
- gst-rtsp-server: <https://gitlab.freedesktop.org/gstreamer/gst-rtsp-server>
- fribidi: <https://github.com/fribidi/fribidi>
- pulseaudio: <https://github.com/pulseaudio/pulseaudio>
- libasyncns: git://git.0pointer.de/libasyncns
- libsndfile: <http://www.mega-nerd.com/libsndfile/>
- libtasn1: <https://www.gnu.org/software/libtasn1/>
- libunistring: <https://www.gnu.org/software/libunistring/>
- nettle: <https://ftp.gnu.org/gnu/nettle/>
- GMP: <https://gmplib.org/#DOWNLOAD>
- GnuTLS: <https://gitlab.com/gnutls/gnutls>
- libproxy: <https://github.com/libproxy/libproxy>
- alsa-lib: <https://www.alsa-project.org/main/index.php/Download>
- gobject-introspection: <https://gitlab.gnome.org/GNOME/gobject-introspection>
- FFmpeg: <https://github.com/FFmpeg/FFmpeg>
