Source Insight is a source code editor by Source Dynamics. Source Insight provides syntax highlighting, code navigation and customizable keyboard shortcuts. It bills itself not just as an editor but a tool to understand a large source code base, and for this reason is called "program editor and analyzer." It is agile and lightweight providing useful features such as relation, context, and symbol windows. It also can display reference trees, class inheritance diagrams, and call trees, as it builds an internal database of symbolic information as it self-parses the source. Its greatest benefit is to speedup code comprehension on an unfamiliar project.
Source Insight Wikipedia
Source Insight provides all the features of the venerable cscope in a GUI environment along with a program editor. These C features are extended to object oriented domain and made more robust by being tolerant of the 'typedefs' or 'pragmas' of embedded processor C extensions. Further innovative features such as 'ifdef support' and conditional parsing allows view of the code with inactive code visually and thus aiding speedy comprehension. As more code is added, Source Insight automatically keeps its database updated, displaying variables in different colors depending on if they are local, global, static, function arguments, or yet undefined.
It is a commercial software with a usual EULA. A 30-day trial version is available for programmers to try to evaluate. Like many program editors it takes some time for a user to appreciate all its useful and some unusual features. Source Insight has a loyal user-base in the software industry as many long time users find it difficult to work without it. Source Insight has been a player for 15 years but being Windows only has its visibility somewhat diminished with the rise of cross-platform development on one hand and programmers being wedded to IDEs from their compiler vendor on the other.
Source Insight supports a wide variety of programming languages but primarily geared towards C/C++, C# and Java.