I've gathered together links to some of the most frequently requested information here
Immigration to Quebec for Skilled Workers: the basics
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Start by reading ALL the information/links on the Immigration Quebec website: there are very few questions that aren't answered
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http://www.immigration-quebec.gouv.qc.ca/en/immigrate-settle/permanent-workers/index.html
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French is not mandatory.
If you wish to get points for French, you need to take an approved exam (list in link below) & reach at least B2 level.
If you wish to get points for English, you need to take IELTS exam and reach CLB level 5.
Note that you can apply without taking the exams, or with lower scores, but you won't get points for language in those cases.
http://www.immigration-quebec.gouv.qc.ca/en/immigrate-settle/permanent-workers/official-immigration-application/requirements-programs/language-knowledge.html
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Points calculation:
https://www.immigration-quebec.gouv.qc.ca/publications/fr/divers/Grille-synthese.pdf
(Yes, it's only available in French; Google Translate does an ok translation). Minimum points required for a single applicant = 49, 57 for a married couple.
AOT (Area of training list) 2015:
http://www.immigration-quebec.gouv.qc.ca/publications/en/diverses/list-training.pdf
Find how many points you score there: that corresponds to the number of points on the "domaine de formation" line on the points grid.
And here's the AOT code list needed for question 8 on the application form:
https://www.immigration-quebec.gouv.qc.ca/publications/en/diverses/code-list-training.pdf
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until the new online tool* is functional (it will be mandatory, so no point filling forms in advance, but you'll see what's required), here's the form:
http://www.immigration-quebec.gouv.qc.ca/publications/en/dcs/Application-selection-certificate-dyn.pdf
Required documents:
http://www.immigration-quebec.gouv.qc.ca/publications/en/dcs/documents-dcs-en-dyn.pdf
Recognised authorities for document certification:
http://www.immigration-quebec.gouv.qc.ca/en/forms/search-title/list-authorities.html
Other forms which may be required are listed here:
http://www.immigration-quebec.gouv.qc.ca/en/forms/search-title/dcs-workers/index.html
*Latest news on the online application tool :
http://www.immigration-quebec.gouv.qc.ca/en/informations/news/news-2015/new-tool-online.html
I hope this helps
Edited to add info and fix typos. If anyone sees mistakes/more typos, please let me know!!!