This one is a quadruple header, in which I discuss not two, three, but four pieces of software that I use pretty regularly for many of my different projects.
You can find and read about Scribus, the free, open source desktop publishing software at http://www.scribus.net
If you want to play Astronomer and have your very own desktop planetarium, head on over to http://stellarium.org/ where you can download it for… you guessed it Windows, Mac and Linux.
Do you develop applications or are in need of a one-file, free, standard-compliant SQL relational database, then go to https://www.sqlite.org to read about and get SQLite for yourself.
Finally, if you are using SQLite, then check out https://www.sqlitestudio.pl/ the perfect open source, free companion to SQLite database, so you can create, edit, populate and query your database, all from one app.
Audacity (Audio recording software) – http://www.audacityteam.org
Blender (2D/3D designing and rendering software) – http://www.blender.org
Calibre (e-book management software)- http://calibre-ebook.com
Dia (Diagram editing software) – http://dia-installer.de
Exact Audio Copy – https://www.exactaudiocopy.de/
Fre:ac – http://freac.org
Gimp – http://gimp.org
Handbrake – http://handbrake.fr
Inkscape – http://inkscape.org
Joplin – http://joplinapp.org
Krita – http://krita.org
LibreOffice – http://libreoffice.org
Makehuman – http://makehumancommunity.org
Nightingale – http://getnightingale.com
Openshot – http://www.openshot.org
Pencil – https://pencil.evolus.vn Pencil2D – http://www.pencil2d.org
QCAD – http://qcad.org
Reaper – http://reaper.fm
Scribus – http://scribus.net Stellarium – http://stellarium.org SQLite – http://www.sqlite.org SQLiteStudio – http://sqlitestudio.pl