This is a shortlist of some of the software packages I might mention during a course. All of them are free and cross-platform.
Cross-platform virtualization application from Oracle for running this course’s Linux image. Download the correct version for your operative system.
The world’s most widely used database engine. Download the «Community edition» to install MySQL on your system.
A commercial GUI shell for MySQL and a lot of other database engines. It has a very nice, graphical Query builder. They have a free, scaled-down version for download at their web site.
SecureDrop is a free, open-source whistleblower submission system maintained my the Freedom of the Press Foundation.