From https://stackoverflow.com/questions/273858/software-worth-buying, https://stackoverflow.com/questions/143088/open-source-c-projects-that-have-high-code-quality and https://stackoverflow.com/questions/180939/net-must-have-development-tools, I found some software tools are multiple recommended such as Reshaper, dotTrace, and NDepend.
I use Visual Studio 2010 Ultimate, and it has some features such as code coverage, profiling, and StyleCop to name a few, and it's pretty expensive.
As a user of VS 2010 Ultimate, is it worth while to invest those tools I mentioned? Or, do they provide similar functionalities that VS 2010 Ultimate already has?
Prosseek, this is a good question you are asking. I have tested VS options and most of third-party options. From my experience, third-parties tooling are always more convenient whatever the area covered. I agree with Ladislav Mrnka opinions: VS Ultimate provides large feature set out of the box but many features are like "basic implementation". In more details:
My opinion is certainly biased concerning NDepend since I am part of the tool team. An objective and measurable fact is that NDepend is 10 to 100 times faster concerning dependency graph and matrix and I encourage you to verify this fact by yourself (NDepend comes with a trial). Also, here you'll find an independent comparison of NDepend versus VS2010 Arch.