Gitweb is a Git web interface. It is written in Perl and can be used as a CGI script, or as a mod_perl legacy script.
License: Open Source
The Open Build Service (OpenSUSE Build Service) is an open and complete distribution development platform designed to encourage developers to compile packages for multiple Linux distributions including SUSE Linux Enterprise Server, openSUSE, Red Hat Enterprise Linux, Mandriva, Ubuntu, Fedora, Debian, and Arch Linux. Developed by openSUSE
License: Open Source
Gitweb is a lightweight web interface specifically for Git repositories, focusing on code browsing and history viewing, while Open Build Service is a comprehensive build management system designed for automating the packaging and distribution of software across multiple Linux distributions. The choice between them depends on whether you need a simple code browsing tool or a full-fledged build management solution.