procps is the package that contains the ps(1), free(1), top(1), vmstat(1), sysctl(1), etc. utilities as well as the libproc library which ties them all together.
All of the utilities use the /proc filesystem.
More information is available at: http://tech9.net/rml/procps/ and http://surriel.com/procps/
There is a mailing list, too.
License: GPL v2
This project has the following developers:
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