Ubuntu Sources List Generator is a website where you can generate a sources.list file with a lot of useful repositories.
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Allmyapps Alternatives
Allmyapps is described as 'The next generation Application Store, providing you with a unique 1 click application installation technology to install all your favorite applications on both Windows and Linux ( http://ubuntu.allmyapps.com/ ) operating systems, in English or French' and is a popular software installer in the os & utilities category. There are more than 25 alternatives to Allmyapps for a variety of platforms, including Windows, Linux, Web-based, Mac and BSD apps. The best Allmyapps alternative is Chocolatey, which is both free and Open Source. Other great apps like Allmyapps are Ninite, Snap Store , Microsoft Store and Zero Install.
Alternatives list
The Debgen is a tool that allows the user to create /apt/sources.list file by adding some extra repositories beyond the standards.
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