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A unified plugin to handle C/C++ as well as the languages that  SublimeCodeIntel  handles would be nice.

Another useful plugin is the CTags plugin.  It requires a lengthy tag generation cycle (particularly if the code resides on a network share.)  But, once generated, navigating the C code is quick.  It is in the package manager.  More info here:

https://github.com/SublimeText/CTags