Here are 101 to make money online. Some of them require no investment at all; some of them require you invest a little money. All in all, it will give you a great idea of how you could be making money online without spending too much.

  1. ClickBank – 10,000 digital product publishers and 100,000 active affiliates
  2. Surveys – make money taking surveys
  3. Dropshipping – sell products that you don’t even own!
  4. eBooks – write and sell eBooks
  5. eBay business – make money selling smart
  6. Craigslist – potentially the biggest money maker out there
  7. Freelance jobs – have any skill? Become a freelancer
  8. ShareASale – get paid for your great content
  9. Selling domain names – buy and sell domain names. Millions to be made in this business
  10. MyLot – pays you for posting and commenting
  11. Sponsored reviews – get paid to write reviews about products
  12. Affiliate Fuel – one of the world’s largest affiliate networks
  13. RSS feeds ads – display ads in you RSS feeds
  14. BitWine – pays for giving advice and answering questions
  15. Digital Journal – get paid to report on news
  16. eefoof – add original content and get paid based on the visitors you get
  17. Blogitive – get paid for posting stories that interest you
  18. Paid links – get paid to display text links on your site
  19. 451 Press – pays you 40% of all revenues generated from your writing
  20. Chacha -  pays them between $5-$20/hour depending on performance
  21. Donations – have a “donation” button on your site/blog
  22. Helium – make money by writing for them
  23. ValueClick Media – a great advertising network
  24. KnowBrainers – pays you to answer questions
  25. Adsense – make money by displaying ads on your site
  26. Creative Weblogging – get paid to blog
  27. LinkWorth – text link ads, paid blog reviews, in-text links, in-content pay per click ads, and more
  28. ReviewMe – get paid to review products
  29. BloggerWave – write reviews on products and services
  30. Meta Cafe – upload your videos and earn money based on the number of views you receive
  31. AdBrite – sell ads on your site
  32. Mahalo Greenhouse – pays you to submit sites to their directory
  33. BlogFeast -blog for their network and generate revenue from it
  34. BlogToProfit – make $dollars by writing posting on your blog
  35. Blish – to sell that content such as ebooks
  36. Amazon Affiliate Programs – make money by linking to Amazon products
  37. DayTipper – get paid for giving tips and tricks
  38. ClickSor – contextual advertising
  39. Appingo – be an editor or a proof reader
  40. Mashable – Mashable is always looking for freelance writers
  41. Share-A-Pic – earn money by uploading and sharing your pictures
  42. Arise – make money providing phone, web and email support for companies
  43. WordFirm – publish books as a freelance writer
  44. CreamAid – advertisers provide you with a topic you have to blog about
  45. Chitika – shopping ads making you money
  46. ClickN Work – get paid $5-$150/hour for doing some freelance work
  47. LeadPile – sell leads to the highest bidder
  48. Ether.com – sell your knowledge by offering consultancy services
  49. Just Answer – get paid to answer questions
  50. Associated Content – they pay you if you write good stories
  51. CafePress – get your free online store
  52. BidVertiser – display ads on your site
  53. UpBlogger – pays you based on the traffic you receive on your uploaded content
  54. Forex-Affiliate – a world leading and highly paying Forex affiliate program
  55. IntelliShop – pays you to shop at stores in your area and write a review of your experience
  56. AzoogleAds – display advertising
  57. Opuzz Voice – earn money doing voice overs
  58. AGLOCO – get paid whenever you browse the web
  59. Focus Pointe Global – get paid to join focus groups and give your opinion
  60. Commission Junction – maximize your revenue opportunities by developing sustainable relationships with top-tier advertisers
  61. eJury – be paid as a mock juror for practice trials
  62. Think Action – fast payments and unique affiliate programs
  63. AdPlosion – becoming an affiliate is free. No fees. No costs. Just a chance for you to benefit, benefit and benefit some more
  64. CraZoo – earn money for starting new threads and posting in online forums
  65. Sell photos – make money selling photos (Fotolia, Dreamstime, Shutterstock, Big Stock Photo)
  66. Virtual assist – become a virtual assistant
  67. Pheedo – add ads in your RSS feeds
  68. Pay Per Post – get paid for blogging
  69. Qumana – embeds ads directly into your blog posts
  70. SlashMySearch – get paid to search the internet
  71. BulletAds -advertising netowrk that pays on performance
  72. OneMonkey – a text based advertising program
  73. Bravenet – pays you $1 for each person you send over
  74. ClixGalore – turn your valuable web site traffic into money
  75. PageFlakes – pays you $1 per referral that you send over
  76. WorkingSOL – handle technical support for large companies
  77. Smorty – get paid for giving your opinion
  78. Tutor.com – get paid to tutor people online
  79. IndustryBrains – place relevant contextual text ads on your site
  80. KarmaOne – make money finding workers
  81. Link Connector – an affiliate marketing network helping merchants and affiliates increase online sales and revenue
  82. Jelly Fish – a shopping website that pays you for referrals
  83. CrispAds – PPC program
  84. Software Judge – They will pay you up to $50 to review software
  85. Yes Advertising – run ads from their sponsors and generate revenue
  86. Social Bookmarker – become a social bookmarker for PR firms
  87. Blogvertise – make money talking about other blogs
  88. LoudLaunch – get paid to blog about advertisers campaigns
  89. AdsMarket – match your traffic to handpicked advertisers
  90. H3 – Get paid to find the right candidate for particular jobs
  91. Squidoo – make money writing about a specific topic
  92. Cruxy – monetization and performance tools for digital creators
  93. LinkShare – use individual product links on your site and generate revenue from sales
  94. MediaFed – generate revenue from your RSS feeds
  95. BlogAds – sell blog ads
  96. RevenuePilot – pay-for-performance and PPC advertising
  97. PeakClick – provides automatic insertion of targeted ads
  98. xxxxxx Media – get paid to write your own blog – UPDATE: Not offering this service anymore
  99. BlogFeast – generate revenue from Google ads when by blogging in their network
  100. ForumBoosting – make money posting in forums
  101. Weblogs, Inc. – they will pay you per post that you write, if you are selected