Chemistry Reference Resolver - saves huges amounts of time by resolving chemistry references (of the form JACS 2011 11211) into URLs for you. No more need to navigate journal web-pages. From my testing: ACS and RSC journals don’t need volume numbers. For Tetrahedron and Tet. Lett.: skip the year, and give a volume number instead.
Feedspot - replacement for Google Reader (for those who remember it), or for others: a good way to keep up to date with journal articles.