port tester windows

I was looking for simple application application that allows to
check port open on remote or local server or see if port is blocked.

I was trying to check port using telnet,
but telnet is old not very convenient command-line tool -
is currently removed from windows7.

Also there are websites for online port test .
They can test only your outside firewall and I was afraid to share information
about my network infrastructure and open ports on internet.

All existed tools like nmap or nc rise bells on corporate antivirus and firewalls.

So I created this simple port testing application.