CanadiaNow

Work permit overview (IRCC):
https://www.canada.ca/en/immigration-refugees-citizenship/services/work-canada/work-permit.html

Work in Canada temporarily (IRCC hub):
https://www.canada.ca/en/immigration-refugees-citizenship/services/work-canada.html

Find out if you need a work permit (IRCC tool/page):
https://www.canada.ca/en/immigration-refugees-citizenship/services/work-canada/need-permit.html

Work permit eligibility (IRCC):
https://www.canada.ca/en/immigration-refugees-citizenship/services/work-canada/work-permit/eligibility.html

Work permit: how to apply (IRCC):
https://www.canada.ca/en/immigration-refugees-citizenship/services/work-canada/work-permit/apply.html

Applying from outside Canada (Guide 5487):
https://www.canada.ca/en/immigration-refugees-citizenship/services/application/application-forms-guides/guide-5487-applying-work-permit-outside-canada.html

Applying inside Canada (extend/change conditions) (Guide 5553):
https://www.canada.ca/en/immigration-refugees-citizenship/services/application/application-forms-guides/guide-5553-applying-change-conditions-extend-your-stay-canada-worker.html

Extend or change a work permit (IRCC):
https://www.canada.ca/en/immigration-refugees-citizenship/services/work-canada/extend.html

Maintained status (extend/change before expiry) (IRCC):
https://www.canada.ca/en/immigration-refugees-citizenship/services/work-canada/extend/apply.html

Open work permit (IRCC Help Centre):
https://ircc.canada.ca/english/helpcentre/answer.asp?qnum=176&top=17

LMIA: do you need one? (IRCC/ESDC):
https://www.canada.ca/en/immigration-refugees-citizenship/services/work-canada/hire-temporary-foreign/find-need-labour-market-impact-assessment.html

Hire a temporary foreign worker (ESDC/TFWP hub):
https://www.canada.ca/en/employment-social-development/services/foreign-workers.html

Check processing times (IRCC):
https://www.canada.ca/en/immigration-refugees-citizenship/services/application/check-processing-times.html

International Experience Canada (IEC) (IRCC):
https://www.canada.ca/en/immigration-refugees-citizenship/services/work-canada/iec.html

Post-graduation work permit (PGWP) (IRCC):
https://www.canada.ca/en/immigration-refugees-citizenship/services/study-canada/work/after-graduation/about.html