Easystruts is old and hasn't been updated for a while because the author apparantly is working for myeclipse.com. For $30 annual subscription all that myeclipse has to offer has been worth it to me. You should consider it if you will be doing any web dev because it has been a time saver for me.
Struts Console is a good plugin only for absolute newbies. Easy Struts, alhtough being a bit outdated, is still more useful- It generates JSPs with Struts-equivlaent HTML tags auto. It also lets u configure the struts-config.xml file automatically. Add to this, generation of the form-beans and action class skeletons, and u have a fairly powerful Struts-Eclipse plugin. Best of all, its easy to use.
Struts Studio has a slightly steep learning curve, and makes u sort of dependent on the plugin for Struts development.
Struts Console is somewhere in between. The myEclipse.com Enterpris workbench ia again, unduly complicated for a beginner. It forces u to learn the plugin, rather tahn Struts itself.