Good day,
About "Arm", it runs on console. Is it the only active project/software for local machine monitoring? I don't find any manual for it in its website, either.
http://manpages.ubuntu.com/manpages/natty/man1/arm.1.html
There's also nyx[0], though I'm not sure how finished it is.
About "Tor2web", are there any clearer figures and docs which could explain the security differences between "Tor" and "Tow2web" ? Especially for the client.
Is there any particular aspect you're confused about? tor2web doesn't provide any anonymity for the client, it's just a web proxy to hidden services. It would be trivial for a tor2web proxy operator to identify visitors if they're visiting directly via the internet.
Sharif
[0] https://gitweb.torproject.org/nyx.git