There are pro's and con's for both proprietary and open source software. It is a question of the right tool for the job. Open source is not necessarily free! I see great opportunities for levelling the playing fields in the South African IT industry, and believe that open source will enable small IT companies in South Africa to provide win-win solutions. Below are some of the key links I track regarding open source software.
An updated list of sites that offer free public domain books (ebooks and audiobooks) that you can download and use legally. Project Gutenberg, Europeana, DPLA, Internet Archive, Feedbooks, Open Library, and more.