copyright free collection of resource images for Delphi menu items and toolbar buttons

There are the silk icons (and others from famfamfam). Those are not copyright-free, but I figure you meant they needed to be unencumbered, free-to-use, etc. (Truly copyright-free stuff will be very, very hard to find.) The silk ones just require acknowledgement somewhere, nothing else.

@PA check this link.

my favorite famfamfam

and these questions in SO

• Where can one find free software icons / images?
• Free set of forms, icons, styles, etc for web-based admin interfaces

and so on.

We use IconExperience which is royalty free. You buy a licence for a company. They do two different libraries, one called V-Collections and the other X-Collections. There are various sections within them, that you can buy separately, but for V-Collections its $379 at most and X-Collections its $289.