Is there any software that sends text messages to show the specified number?

No software can do this, because no matter how you send it, this short message will go through the system of network service providers (such as China Mobile and China Unicom), and then the system will send your short message. The system relies on the authentication of the sender's sim card to identify the user, so the short message sent will only be identified as the sender's mobile phone number.

But if you can get his mobile phone, there are many ways to make his mobile phone display any number of text messages.