wordpress plugin that show my reputation (points) in any stackexchange project in my wordpress blogs

I don’t know of a plugin but the easiest way is to just embed your stack flair: https://stackoverflow.com/users/flair

For a more detialed solution I recommend you just fetch the Stack API using the the WordPress HTTP API, the docs are here: http://codex.wordpress.org/HTTP_API

The Stack API is very easy to work with and returns JSON. For you reputation for example you would query this url, you can change the site paramater to the ones you want: http://api.stackexchange.com/2.1/users?order=desc&sort=reputation&inname=saber%20tabatabaee%20yazdi&site=stackoverflow

so you would have something like this in your plugin:

$stackProfile="http://api.stackexchange.com/2.1/users?order=desc&sort=reputation&inname=saber%20tabatabaee%20yazdi&site=stackoverflow";
$stackAPI = wp_remote_retrieve_body( wp_remote_get($stackProfile) );
//your output

The Stack paramaters you can query are here: http://api.stackexchange.com/docs