This page lists plugins that are known to either work or break with transposh

Plugin Name	Version	Compatible	Note
WP Super Cache	0.9.9	V	Code in transposh makes sure translations invalidate cache when needed
Google XML Sitemaps	3.2.3	With patch	Patch Available, handles only sites with 50,000/languages urls due to this plugin limitations
	3.2.4	With patch	Patch Available, transposh 0.6.6 and up
	4.0b3	V	Patch no longer needed from 0.6.6 and up
BuddyPress	1.2.4.1	V	Support is in since 0.5.5

This is a similar matrix for themes

Theme Name	Version	Compatible	Note
Fusion	2.2	V	Used on transposh.org