Information Wants To Be Free. Information also wants to be expensive. ...That tension will not go away. -- Stewart BrandPublications (journals, research papers etc.) on IEEE, ACM etc. are not available for free. But there are many websites online that collect and archive freely accessible Computer Science research publications.
Open access to 685,652 e-prints in Physics, Mathematics, Computer Science, Quantitative Biology, Quantitative Finance and Statistics. Pre-publication versions of many IEEE, ACM etc. publications are available on this website.
A collection of freely available, previously difficult-to-access, academically-oriented digital resources that are easily searchable by anyone. It has digital resources including born-digital texts, audio files, images, movies, datasets etc. The collections include theses, technical reports, research papers, image collections etc.
OpenDOAR is an authoritative directory of academic open access repositories. Each OpenDOAR repository has been visited by project staff to check the information that is recorded here. This in-depth approach does not rely on automated analysis and gives a quality-controlled list of repositories.
Bielefeld Academic Search Engine (BASE) is one of the world's most voluminous search engines especially for academic open access web resources. BASE is operated by Bielefeld University Library.
5. http://infomine.ucr.edu/cgi-bin/search (This advanced search page has a drop down menu "Resource Access" to display only 'free' publications in search results).
INFOMINE is a virtual library of Internet resources relevant to faculty, students, and research staff at the university level. It contains useful Internet resources such as databases, electronic journals, electronic books, bulletin boards, mailing lists, online library card catalogs, articles, directories of researchers, and many other types of information.
Shodhganga@INFLIBNET Centre is a reservoir of Indian thesis and dissertations.
Under the initiative called “ShodhGangotri”, research scholars / research supervisors in universities are requested to deposit electronic version of approved synopsis submitted by research scholars to the universities for registering themselves for the Ph.D programme.
Open Journal Academic System (OJAS), another INFLIBNET initiative, archives many journals from Indian colleges and universities (referred to as INFILIBNET Online Journals).