The CLI can be used to simplify working with PIPEFORCE.
You can download the latest version here.
Follow the download and installation instructions here.
The BPMN modeler is a free tool to design BPMN diagrams and save the BPMN files offline. These files then can be deployed to PIPEFORCE using the workflow.deploy command or using the online workbench.
The PIPEFORCE Web Portal has also an online BPMN designer built-in, so an offline tool like this is optional.