http://www.immi.gov.au/ - official site related to immigration to Australia. All about visas, citizenship, living etc. Everything you should know about immigration can be found here.

http://www.immi.gov.au/allforms/booklets/1119.pdf - the most useful booklet for starting immigration process. What to do, where to apply and so on. Must read booklet.

http://www.immi.gov.au/skilled/general-skilled-migration/175/eligibility... - official documents check list with ability to check you score.

http://www.immi.gov.au/allforms/pdf/1121i.pdf - skilled occupation list (SOL). This information form lists the skilled occupations which are acceptable for permanent and temporary skilled migration.

http://www.ielts.com.ua/ - "International English Language Testing System". Ukrainian IELTS centre. Everything regarding this exam in Ukraine.

http://www.gday.ru/ - A Lot of information about immigration to Australia.
http://www.gday.ru/phorum/ - One of the best forums regarding immigration. The best place to ask questions and to share with your experience.