Network Utility in OS X is an useful application that allows you to do things such as port scans, traceroute, ping and get network interface information.
If you are using OS X Mavericks, and have used Network Utility before, you have now probably noticed that it is not in Utilities folder anymore.
Location of Network Utility has been changed to /System/Library/CoreServices/Applications/.
You can launch the application from here, or you can create an alias and copy it to Applications folder.
Read more about Network Utility on Apple support page.
You may have been in a situation where Visual Studio 2012 notification about available updates has popped up, but you’ve been too busy to do the update at that particular time. If you closed Visual Studio, the update notification is gone, and on starting up VS again sometimes it does not appear.
You can manually initiate an update, but it is somewhat hidden. To do a manual update, open Visual Studio and go to Tools -> Extensions and Updates. On this screen you’ll see any available updates that haven’t been installed. To install an update, select it and click on “Update”.