Hi,

first edition: BaszaR
second edition: Supryk (small optimization, add newest members and most viewed thrads)
third edition: lukasamd (rewrite plugin code, optimization)
fourth edition (first for mybb 1.8) : Supryk (fit on mybb 1.8, add top refferals)



Instalation:

Upload all files
Go to ACP and install plugin
Add to your index template 

{$topStats['LastThreads']} 
{$topStats['LastActiveThreads']} 
{$topStats['MostViews']}
{$topStats['Posters']}
{$topStats['Reputation']}
{$topStats['Referrals']}
{$topStats['TimeOnline']} 
{$topStats['NewestUsers']}
{$topStats['Moderators']}