PSWriteLog is a tool to standardize logging without the need to use new function calls in your PowerShell scripts. Just configure the log location (or don't) and start logging with your standard Write functions.

PSADT is the unofficial powerShell module for PSAppDeployToolkit. The PowerShell App Deployment Toolkit provides a set of functions to perform common application deployment tasks and to interact with the user during a deployment. It simplifies the complex scripting challenges of deploying applications in the enterprise, provides a consistent deploy... More info

Sample scripts from the Windows PowerShell Cookbook

Nested error record and exception identification, and stack dumping