this thread will track commands to control PC, programs  and Network stuff

yes it is: a LAN IP scanner ... 
(just make sure you adjust it to your local network IP settings
http://voxcommando.com/forum/index.php?topic=1683.msg14657#msg14657

another LAN scanner
http://voxcommando.com/forum/index.php?topic=2328.msg20110#msg20110

Here is a special ping that monitors LAN for devices coming online or offline
http://voxcommando.com/forum/index.php?topic=1301.msg11240#msg11240

This one is classic ping command, can be used to check if a computer, phone, or other equipment is on and in the LAN, Or ping website to check if there is Internet connection
http://voxcommando.com/forum/index.php?topic=1561.msg13602#msg13602

DynDNS updater ... it is for No-IP but can be used as base for other services
http://voxcommando.com/forum/index.php?topic=1974.msg17017#msg17017

This post track commands related to VC itself ...

Log management
http://voxcommando.com/forum/index.php?topic=1814.msg15758#msg15758

this one allow issuing multiple commands using the prefix only one time (useful in open-air Mic setup)...
http://voxcommando.com/forum/index.php?topic=1602.msg14008#msg14008

VC adaptive confidence level ... however this command will adjust it down only. so it is recommended not save it permanently (disable the part that modify options), this will make VC revert to original setting after restarts
http://voxcommando.com/forum/index.php?topic=1690.msg14675#msg14675

Starting VC minimized ...
http://voxcommando.com/forum/index.php?topic=1505.msg13065#msg13065

Browsing and scanning for specific file type ... and launch it with default application
http://voxcommando.com/forum/index.php?topic=2402.msg20723#msg20723

Navigating running Applications, try this one
http://voxcommando.com/forum/index.php?topic=2403.msg20724#msg20724
and this one
http://voxcommando.com/forum/index.php?topic=1996.msg17166#msg17166

this command can convert folders into payload ... one of the possible application is browsing windows explorer using speech.
P.S. the actual browsing command must be built. this command is merely a function to convert folders to payload
http://voxcommando.com/forum/index.php?topic=1569.msg13719#msg13719

Integrating Windows Task Scheduler with VC. it is only the base function.
can be used to develop something like: "VC schedule to scan hard disks on next Tuesday at 9.00 pm" or "VC schedule a reminder every Sunday at 9.00 am" ...etc.
http://voxcommando.com/forum/index.php?topic=1780.msg15515#msg15515

This one illustrate how to kill a program (it shows killing XBMC but can be modified easily)
http://voxcommando.com/forum/index.php?topic=1311.msg11298#msg11298

if you need to determine the PC name VC is running on and/or the current logged user:
http://voxcommando.com/forum/index.php?topic=2507.msg21623#msg21623
Note: this has become redundant from version 2.216, James introduced a new action that retrieve this and many other variables. commands listed for learning purposes only

Chrome
http://voxcommando.com/forum/index.php?topic=811.msg6506#msg6506

mouse Control ...
http://voxcommando.com/forum/index.php?topic=376.0

here how to make VC launch programs
http://voxcommando.com/forum/index.php?topic=1294.msg11162#msg11162

based on one above, same function ... but more flexible (can launch programs or trigger events) and fully automatic update of command (it is in the same thread)
http://voxcommando.com/forum/index.php?topic=1294.msg19599#msg19599