Workflow - Plugins - Protirus - Restart Workflow Services
The 'Restart Workflow Services' plugin will restart the Workflow Service (swfsvr) as your user account.
Workflow - Plugins - Protirus - Recycle App Pools
The 'Recycle App Pools' plugin allow you to Recycle a chosen App Pool via a Form.
Workflow - Plugins - Protirus - Task Tray Tool
The 'Task Tray Tool' plugin opens the Task Tray Tool app so the icon shows in the Task Tray ready for use, it was added to make it easier to find.
Workflow - Plugins - Protirus - Model Info
The Model Info plugin displays a list of all Models within the current Project. When you select a given Model a list of Components are displayed, showing their Id, Name and Description.
Workflow - Plugins - Protirus
Symantec 
Workflow Manager has a number of Plugins available from install.
Workflow - Plugins - Protirus - Powershell
The 'Powershell' plugin opens a file picker, filters on Powershell file extensions (**.ps1*, *.psm1, *.psd1) and then runs the chosen file with custom param ($project) that can be used in your Powershell script.