added blackfire

README.md

@@ -47,6 +47,7 @@ Table of Contents
    * [Vagrant Related](#vagrant-related)
    * [Vagrant box indexes](#vagrant-box-indexes)
    * [Data mining](#data-mining)
+   * [Profiler](#profiler)
    * [Other lists](#other-lists)
 
 ## Source Code Repos
@@ -517,6 +518,9 @@ Table of Contents
   * https://wit.ai/ - NLP for developers
   * https://www.wolfram.com/language/ - Built-in knowledge based algorithms in the cloud
 
+## Profiler
+ *  https://blackfire.io - Blackfire is the SaaS-delivered Application Performance Solution. Free Hacker plan.
+
 ## Other lists
   * https://github.com/httpsGithubParty/FOSS-for-Dev - A hub of Free and open-source software for developers
   * https://github.com/pborreli/free-for-nonprofit - List of free services for non-profit organisations