First featured on screen in 1, popularly shown in 2 and claimed to have been shown in 3.
What?

1. 

2. ``

3. 

Hint: Look closely in 2 :)

Prasad , bs , ramsaravana , Abhishek , Sharath , uma , Tathagata Chatterjee , udupendra , piezocake , Mahesh Herle , Gammafunction , yaksha , Shashank “hacked” the answer. :)

2ndratequizzer got close.

The answer is nmap, a port scanning tool which can be downloaded from insecure.org. Typically, it is used by hackers (ethical or otherwise) to first find out which ports on a target machine are open.

1. Featured the Source code of nmap

2. Trinity in Matrix Reloaded using nmap to port scan and attack the “Grid System” using a well known attack called SSH1-CRC to gain access. This was even featured in a BBC news article. This is also the first Hollywood movie to show a proper hacking scene.

3. Many people claim to have seen nmap in action in this movie. Screen shots are available all around the net.

Prasad, bs, ramsaravana, Abhishek, Sharath, uma, Tathagata Chatterjee, udupendra, piezocake, Mahesh Herle, Gammafunction, yaksha and Shashank