Compress-EnvironmentVariables.ps1: Replaces each of the longest matching parts of a string with an embedded environment variable with that value.
Expand-EnvironmentVariables.ps1: Replaces the name of each environment variable embedded in the specified string with the string equivalent of the value of the variable, then returns the resulting string.
Files
Backup-File.ps1: Create a backup as a sibling to a file, with date and time values in the name.