Good plugins?

[Vapor]

Obviously zinga and rateu are in a class by themselves, but how can I tell if I have secure plugins from other developers? (besides the obvious once it's too late)

MyBB version: 1.6.1

I'm currently using these plugins:

Group Post CSS (2.0) - ACTIVE
Allows you to set the CSS for a groups post.
Created by Jammerx2

Grouped Subforums (1.0) - ACTIVE
Sorts your subforums on the index into groups
Created by Janota

Footer chatbar (1.0) - NOT ACTIVE YET
A footer chatbar for users online.
Created by Janota

Extra securty question (1.0) - NOT ACTIVE YET
Adds a question to the registration process.
Created by Janota

Rss to Post (1.2.2) - ACTIVE
See the "RSS To Post" section in the ACP Configuration Menu to configure this plugin.
Created by DennisTT

XThreads (1.337) - ACTIVE
eXtend your Threads with extra fields.
Created by ZiNgA BuRgA