Coursera: Online courses some are free and some cost money (especially if you want a diploma/certificate)
EdX: Free online courses from the top universities in the world (for a diploma/certificate it costs money.)
General Electronic Engineering and Computer Science websites
arXiv.org : A full text open-access archive of articles (both pre- and post-publication) covering physics, mathematics, and computer science (including the Computing Research Repository).
Cogprints: An electronic archive for self-archiving material, also including many computer sciences disciplines.
TechXtra: Helps you find articles, key websites, books, the latest industry news, job announcements, ejournals, eprints, technical reports, the latest research, thesis & dissertations.
Wolfram Demonstration Project: Open-code project which aims to visually explain concepts within science, technology, mathematics, art, finance, and a range of other fields.
Professional Organisations
Professional organisations (United Kingdom)
British Computer Society (BCS): provides information about the activities of the Society, careers information and qualifications.