Three very useful pages about preparation, pH range and color change of acid-base indicators: Acid Base Indicators, ChemDAT Indicators and Preparation of Acid-Base Indicators.
Chemical & Engineering News presents a collection of articles that gives you a look at the chemistry behind a wide variety of everyday products.
For the most curious, the Chemical Abstracts Service (CAS) offers the opportunity to know the chemistry (or chemistry-related) most cited, most intriguing and most requested publications of their databases. This free service is provided through CAS Science Spotlight (source: Carolyne’s pages of interest).
Everybody is talking about Google Scholar. The best post I have seen until now about this was on ResourceShelf. We all know what Google is capable of but for now I still prefer the Scirus search engine.