Software management on linux

Debian has the largest package library of software.
It uses a package format .deb  that are installed by the dpkg app. 
In order to manage dependencies and download automatically there is apt (Advanced Packaging Tool).

Synaptic is a graphical package management tool based on GTK+ for apt.
Apt commands in the console.

apt install	apt-get install	Installs a package
apt remove	apt-get remove	Removes a package binaries
apt purge	apt-get purge	Removes package with configuration and user data
apt autoremove	apt-get autoremove	Removes unused dependencies
apt upgrade	apt-get upgrade	Upgrades all upgradable packages
apt update	apt-get update	Refreshes repository index / package list
apt full-upgrade	apt-get dist-upgrade	Upgrades packages with auto-handling of dependencies
apt search	apt-cache search	Searches for the program
apt show	apt-cache show	Shows package details

apt list	Lists packages with criteria (installed, upgradable etc)
apt edit-sources	Edits sources list

You can use synaptic  as a GUI for apt.

apt autoremove packagename --purge  - remove binaries, config, user data and dependencies - complete uninstall

apt list --installed | grep packagename - check if you have some package installed

Note: - purge only removes system wide configuration from the /etc folder.
It does not remove user profiles that are stored in the home folder .config and .cache folders

To remove 32 bit architecture packages and remove source repositories

sudo apt-get purge `dpkg --get-selections | grep ":i386" | awk '{print $1}'`
dpkg --remove-architecture i386
dpkg --print-foreign-architectures

https://ninite.com/ - package repository for windows.