What is 'connectservice.app' It's in my Login Items.  Examining the package shows a reference to arcsoft.com.  But I don't have either of their Mac products (Panorama Maker or PhotoStudio) installed, and never have.
I't main purpose is to keep you using ArcSoft products.


Stop ArcSoft Connect Service:
Launch "Activity Monitor" from /Applications/Utilities, select "ConnectService" and then click Quit Process.
Delete following folders or files:

/Applications/ArcSoft Connect Suite

/Applications/[Product Name]

/Library/Application Support/ArcSoft

/Library/Receipts/*.pkg

~/Library/Preferences/com.arcsoft.*

~/Library/Preferences/Application Support/ArcSoft

~/Library/Preferences/ByHost/com.arcsoft.*


Notes: 
[Product Name]: represents the ArcSoft product you want to uninstall (there may be some more than listed there).

You may also need to read this.