is there great third party plugin for hitfim 4 express?
Simple answer no, plugins that Hitfilm use are Mocha and Borris FX. Both are great. I think Borris can be a purchase option, but Mocha is PRO only.
What did you have in mind?
No Plugins work with Hitfilm 4 Express by design. Plugins work in the Pro version, it's one of the things that makes it worth upgrading if you have a lot of OFX plugins you'd like to use. So Boris, Red Giant, NewBlue and lots of others work with Pro.