As noted already, support for CSS3 effects and transforms is irregular and a work in progress. Within that framework, the four available transforms (
skew) are relatively stable and widely supported. Effects, on the other hand, are less consistently supported and less finite in the sense of there being a "list" of available effects that are supported (albeit with unique coding prefixes) across browsing environments.
Part of the reason for this is that a number of effects are very flexible. For example, the
text-shadow effect can be tweaked to produce an outlined type. And sometimes, you will hear people refer to an "outline" effect, by which they mean adjusting the parameters of the
text-shadow effect to ...