Dwenaus

BuddyPress 1.6 compatible. Users can rate forum posts in BuddyPress. Good posts are highlighted and poor posts diminished. Highlighted karma points shown for each user. Only works with forums for groups; not compatible with site wide forums.
Features & Options: 
* Post rating and responses via ajax. 
* Posts can only be rated once: thumbs up or thumbs down. This can be replaced with ‘like’ and ‘dislike’. Super-admins can rate a post as much as they want, however group admins can only rate once. 
* Good posts are highlighted light yellow (default +10), great posts are highlighted bright yellow (default +25), poor posts become slightly opaque (default -3), and very poor posts have their content hidden and viewable via an ajax link. (default -6). 
* Karma points are given to each user based on their posting history. Karma points can be based on total accumulated ratings (good for quiet sites), average post rating (good for very busy sites) or a balance of the two (good for medium traffic sites). The default is the later. 
* User Karma points are highlighted depending on number of karma points. There are 5 levels (based on natural log). Default, above 7p, above 19p, above 51p, and above 138p. The scale goes from grey to bright yellow. These values can be edited in bp-rate-forum-posts.php 
* Topic ratings are shown in group and forum listings view using the rating of the initial post. 
* Only logged-in users can rate posts. 
* No new database tables are created. 
* Post Karma shows on Member view 
* There is an admin screen to change karma levels, post highligting and diminishing values, and karma calculation method 
* No post rating when the topic is closed (except admin)
Thanks to Intense Debate for their thumb graphics and good layout.

BuddyPress Rate Forum Posts

Users can rate group forum posts in BuddyPress. Good posts are highlighted and poor posts diminished. Highlighted karma points shown for each user.

ernestortiz

An iconic rating system. You can select in which type of post the review appears, where in a DIV, the number and look of the review stars (or whatever icon from font awesome) as well as its behaviour (some CSS3 transformation actions and a tooltip), etc.
<h3>Donations</h3>
If you want to help me in writing more code or better poetry, please invite me to a beer (or coffee, maybe) by sending your thanks to my PayPal account (ernestortizcu at yahoo.es). Thanks in advance.

Iconic Rating

Review or rating any post type, with stars or other awesome icons, adding some effects on hover (and tooltips).

BuddyPress Rate Forum Posts vs Iconic Rating