I have tried a number of cache plugins for wordpress, but DB Cache Reloaded has been the best one so far. It caches SQL database requests rather than whole pages, which is how WP Super Cache works, using less memory. This plugin CAN be used with WP Super cache if you really want to, but i don’t recommend it.
DB Cache Reloaded is actually an improved version of the previous just “DB Cache”, I think the reason for the new version is because of that the creator stopped supporting and developing the plugin.
However, i would recommend that you get your own web host and upload the WordPress “self-hosted” package to it, that way you will have so much more control over your blog. And you also get to upload much more richer content.
So, Cache means faster website ey? Well not in my case, the wordpress plugin “WP-Total cache” actually made my website slower! I was able to diagnose the problem using firebug, some CSS sheets tog a very long time to load, probably because they where cached some place, so i just disabled the plugin and POW!!! a super fast wordpress site!
Tell my about your experience, and leave a comment below!