Windows NT has an 'at' command. See your favorite NT reference for details. Since it has an "/every:" parameter, the Windows NT 'at' command takes the place of UNIX's 'cron' as well as 'at'. If you purchase and install the Resource Kit (which you probably have done, since its SRVANY.EXE command is required to install WinAppxD.exe), you can use the WINAT.EXE graphical shell around the 'at' command, for more user-friendly scheduling. Third party software companies offer enhanced alternatives to 'at', but we do not have experience with them.
LBM Systems makes a product called "UniQue", a print queue manager for NT as well as for Unix. Many APPX customers are successfully running it in combination with APPX. UniQue can be ordered from APPX resellers or from APPX Software directly.
No real equivalent exists. If you are running APPX using shared disk (rather than Presentation Server and "appx -c"), you can use standard Windows NT administrative utilities to see which APPX files a specific network user has open. However, since this only monitors network file sharing, it does not help for APPX Presentation Server.
Try the NT Task Manager. If that's not enough, look for the 'PVIEW.EXE' command in the NT Resource Kit.
awk, grep, cat and other UNIX utility commands are available from a variety of sources. Most APPX consultants and third-party developers seem to prefer the free Cygwin utility collection. There are also various POSIX (aka UNIX) utilities available on the NT Resource kit. Commercial vendors such as MKS also supply UNIX commands for Windows NT.