WP Fcashe
WP Optimize Speed By XTraffic
APC Cache Purge
YouTube Information Widget
WP Nav Menu Cache
Uncache Script
Speedly
Transpinner (Free Edition)
Klix Image DimSum
Redis Object Cache
Fast Category Cloud WordPress Plugin
Plugin Output Cache
L10n Cache
Vitamin
WebStudio
Cache Translation Object
Twitter Counter Cache-rizer
Avoid Google's Cache
Database Read Replicas
Menu Cache
Pods Alternative Cache
Multi-Varnish HTTP Purge
Blunt Cache
Twitter Display And Cache
Wordpress Varnish ESI Widget
Versions
WP RSS Cache Flusher
FeedCache Pipes