HackerJacker is primarily a collection of online tools and services that can help provide analysis of malicious content and threat intelligence for incident response.  The story has gradually developed to include other information security material. 
The original idea
 started off with intention 
to create a referenced site 
for daily
 investigations. Having an organised way of validating threats from 
one place definitely makes life easier. 
Having seen the benefits, the site is being shared as reference point for others and hope this can be of benefit to IT admins and security folks everywhere around the world.