added new search engines

- signed-off-by: trimstray <trimstray@gmail.com>

README.md

@@ -417,6 +417,10 @@ performance of any of your sites from across the globe.<br>
 &nbsp;&nbsp;:small_orange_diamond: <a href="https://www.databreaches.live/"><b>databreaches</b></a> - was my email affected by data breach?<br>
 &nbsp;&nbsp;:small_orange_diamond: <a href="https://builtwith.com/"><b>builtwith</b></a> - find out what websites are built with.<br>
 &nbsp;&nbsp;:small_orange_diamond: <a href="http://www.mmnt.net/"><b>Mamont's open FTP Index</b></a> - if a target has an open FTP site with accessible content it will be listed here.<br>
+&nbsp;&nbsp;:small_orange_diamond: <a href="http://index-of.es/"><b>index-of</b></a> - contains great stuff like: security, hacking, reverse engineering, cryptography, programming etc.<br>
+&nbsp;&nbsp;:small_orange_diamond: <a href="https://osintframework.com/"><b>OSINT Framework</b></a> - focused on gathering information from free tools or resources.<br>
+&nbsp;&nbsp;:small_orange_diamond: <a href="https://pipl.com/"><b>pipl</b></a> - is the place to find the person
+behind the email address, social username or phone number.<br>
 </p>
 
 ##### :black_small_square: Passwords