Vizag Daily gives a link to Alpajeevi by Rachakonda Viswanatha Sastry.
I have been hoping to make diditally available Rallapalli Ananthakrishna Sharma's works. Some are already available though some pages on the first book are not too clear. Here are the links to Vemana an Shali Vahana Gatha Sapthashathi Saramu from the Digital Library of India (These were probably sent to me by Sri J.K.Mohana Rao long ago). Some four articles are in the 'vachana' section of Andhrabharati.
I read only two of his books long ago and feel that he combines deep traditional knowledge with modern scholaly approach. Another such person may be P.V. Parabrahma Sastry who studied Kotilingala coins from Satavahana period and also Kurkyala inscriptions.
See also తెలుగు పరిశోధన for links to Telugu digital books.