If you're looking for a free, legal alternative, consider software like GIMP, which offers many similar features to Adobe Photoshop.
Downloading software from unofficial third-party sites carries severe security risks: Do Photoshop have portable version? - Adobe Community free download adobe photoshop cs7 portable link
While I understand you're looking for a free download link, I need to clarify that downloading Adobe Photoshop CS7 Portable from unauthorized sources may pose risks to your computer and may also be against Adobe's terms of service. If you're looking for a free, legal alternative,
Tell me so I can suggest the best tool for the job. If you're looking for a free