You can do small jobs like teaching English, audio transcription, microtasks, or surveys. It's not a fortune but if you have time to spare anyway it's a good way to pay a few bills or get a little extra spending/indulgence money.
Here is a list of sites for online work that anyone can use:
Appen - Paid Projects, up to 20 hours a week. Decent pay of about $14 per hour but depends on the project you can get
Lionbridge - Paid projects, great projects on offer
TeamWork - Paid projects, good site.
ClickWorker - Surveys and Writing - payments vary per task
Neevo - Tasks , up to $1 per task approx
Vipkid - Teach English to kids online, $15-$25 per hour or so
QKid - Same as vipkid teaching English online - I think this pays up to $20 per hour
gogokid - Teach English Online $14-25 per hour
Prolific.co - Surverys, pays very well!
Mturk - Microtasks - Pay is okay, but seems good
Rev - Transcription
TranscribeME - Transcription
GoTranscript - Transcription
Qmee - Surveys, varying payout on each one...pretty good site.
Swagbucks - Surveys, good paying.
Timebucks - Various surveys, good site.
GG2U - Surveys, good site with good payout, probably average of $1 per survey
Serpclix - Good one for tasks/surveys - install on your browser and it will let you know when there are some available
BrandedSurvey - Surveys
20Cogs - You complete 20 offers to get the payout, you will have to cancel a few subsciptions after some tasks but it's a good way to make about $230-$330
Panelbase.net - Surveys, Mostly they pay $1-$5
YouGov - Surveys, good site and pay is decent.
populuslive.com - Surveys, pay is decent.
Ysense - Surveys and other tasks
Prizerebel - Surveys and other tasks
Microworkers - Various tasks
HideOutTV- Watch videos and get paid
HoneyGain- You get paid for browsing the internet every month, maybe $40 or so