We have reviewed request no. 650 for the year 2005, which includes the following question:

I own a small computer company. I design accounting software which I sell to franchised clothing stores. This software allows management to track the arrival and departure times of employees and control the stores' stock inventory and client database. Some of these stores sell skin-tight shirts and pants. Is this permissible?
 

From the established principles of Islamic law is that if a commodity can be used for either purpose — lawful and prohibited — then the sin for its prohibited use only falls upon the user and there is no blame on the manufacturer or the seller. The owners of the stores selling these commodities are not obliged to ask every woman about her mode of dress, because women can legitimately (Islamically) wear these clothes at home or under their gowns.

The Ruling
It is permissible to sell these clothing items, and deal with those who sell them.
God the Almighty knows best.