I have localize WP-Stats and WP-UserOnline in addition to WP-Polls. If any one of you willing are to test it for me, the downloads links are as follows:
» WP-Stats 2.06 Localized Version
» WP-UserOnline 2.06 Localized Version
If you do test it, please feedback to me if there are any text not translated properly or can be improved. Thanks alot.
Example of WP-UserOnline: You need to create a new .po based on the .pot then after translating you need to save as for example: wp-useronline-de_DE.po where de_DE is your language. The poedit (I assume you are using poedit) will generate a file called wp-useronline-de_DE.mo.
Note: make sure that both files are in wp-content/plugins/useronline