I use and like bash too. However, bash has no repository with bash packages, which can be downloaded and installed automatically by package manager, like Perl and CPAN, PHP and PEAR, Python and easy_install, Java and Maven/Ivy, JavaScript and NodeJS, or even Linux and apt/yum.

I understand that problem, so I use my own bash-modules system to speed-up development in bash (see http://vlisivka.pp.ua/en/bash_modules ), but number of modules is so tiny, so there is no sense to create repository for these modules.