Cscope

Cscope is a highly valuable developer's tool that is specifically designed for browsing source code. The software has its roots firmly planted in Unix, as it was initially developed at Bell Labs during the heyday of the PDP-11. In fact, Cscope has enjoyed a long and illustrious history within the Unix community, being an integral part of the official AT&T Unix distribution for many years.

One of the standout features of Cscope is its ability to scale effectively, allowing it to be used in projects with enormous code bases. With a project history that includes successfully managing projects with over 20 million lines of code, it's clear that Cscope is a powerful and reliable tool that can handle even the most complex development efforts.

Thanks to the efforts of the Santa Cruz Operation (SCO), which has since merged with Caldera, the Cscope code base was open sourced under the BSD license in 2000. This move has further expanded the reach and potential of the software, ensuring that it remains one of the most useful and widely-used tools within the development community.

Overall, Cscope is a highly useful and reliable tool that can make it much easier to browse and manage source code for any development project. Whether you're a seasoned software developer or just starting out in the field, Cscope is definitely a tool that deserves your attention and consideration.