PI Client 5.5.25 is available as a free download on our software library. The program lies within Business Tools, more precisely Investment-Tools. This free software is a product of PartsTrader.
From the developer:
The PI (PartsTrader Integration) Client is a small windows tray application and windows service which runs on a repair shop PC or server. This little set of apps makes sure that estimates from your Estimatic software are exported to PartsTrader, and once you’ve selected or ordered your parts, import the part prices and changes back into your estimate. This saves you the trouble of doing any importing or exporting of this information by hand.
You may want to check out more software, such as Sonic Pi or eM Client, which might be related to PI Client.