1)   Webserver Stress Tool 7.2.1.246
Webserver Stress Tool is a powerful HTTP client/server test application, designed to pinpoint critical performance issues in your web site or web server that may prevent optimal experience for your site's visitors. Supports SSL.

 2)   COM Port Stress Test 1.2.1.21
COM Port Stress Test is a compact and affordable tool for testing COM, RS232 and RS485 ports that generates an extremely fast data stream with alternating baud rate, flow control, RTS and DTR states. Try it right now and you won't be disappointed!