SharePoint Solution Exporter is a tool you can save your Sharepoint site feature or global deployed solution easy.
Run application by MOSS administration account on your Sharepoitn server environment. To save as your solution click your application, select solution which you want to save your local disk and click save as button. Tool ask you save directory. Select one and click ok. if you wan to save global deployed solution place check "Get only Global Deployed solution(s)" check box.

This tool copy Sharepoint solution as .wsp file format.

Requirements:
* Sharepoint Server

The license of this software is Free, you can free download and free use this server utility software.