The PowerShell Gallery is a centralized collection of Windows PowerShell modules and scripts, and Desired State Configuration (DSC) resources. It can be accessed from its web front end at http://powershellgallery.com, or by using PowerShell. Cmdlets such as Find-Module, and Save-Module allow a person the ability to search and download new modules and DSC resources directly from the PowerShell console. It's in limited preview, and while I've yet to publish anything myself, I did notice an area where it can use some improvement.
Follow me along as I hit a snag with the xJea DSC resource, and how the PowerShell Gallery can be improved: http://tommymaynard.com/quick-learn-search-powershell-gallery-module-for-requires-2015.