A very good compilation of 250+ tools that include:

• CMS
• Blogging platforms
• SEO tools
• Website performance
• Usability
• Online marketing
• Inbound marketing
• Social media management suites
• Content discovery
• Content creation
• Content optimization
• Content sharing
• Influencer / follower management
• Email marketing
• Brand / topic analysis and monitoring
• User / visitor analysis
• Webinars
• Facebook tools
• Twitter tools
• LinkedIn tools
• Pinterest tools
• Google+ tools
• YouTube tools
• Tumblr tools
• Podcasting
• Livecasting

It’s all here: http://59staples.com/blog/content-marketing-tools/