Teubners online

A useful link for people on the Cambridge network (and any other subscribing institution): the De Gruyter online ebooks includes lots of Teubner editions, available to be downloaded in pdf format from this link here.  (Click the 'Series overview' tab and then the links to the various texts.  If you see a 'Read content' box like for the Sextus Empiricus volume here, then you can download away.)  They have lots of other books here too.  Search for what you want and then you will be able to access the pdfs by clicking when you see a 'Read content' button (e.g. for the recent Anaximander und Anaximenes here).