There are numerous online marketing tools available today that businesses can use to effectively promote their products or services. Here are some of the most popular ones:

1. Social media management tools: These tools help businesses manage and schedule their social media posts, engage with their audience, and analyze the performance of their social media campaigns. Examples include Hootsuite, Buffer, and Sprout Social.

2. Content management systems (CMS): CMS platforms enable businesses to create, manage, and publish content on their websites. They often have built-in SEO features and allow for easy customization. Popular CMS platforms include WordPress, Drupal, and Joomla.

3. Email marketing tools: These tools assist businesses in creating and managing email marketing campaigns, including designing templates, managing subscriber lists, and tracking email performance. Examples of popular email marketing tools include Mailchimp, Constant Contact, and Sendinblue.

4. Search engine optimization (SEO) tools: SEO tools help businesses improve their website's visibility in search engine results. They provide insights on keyword research, on-page optimization, backlink analysis, and competitor analysis. Examples include SEMrush, Moz, and Ahrefs.

5. Pay-per-click (PPC) advertising platforms: PPC platforms enable businesses to create and manage paid advertising campaigns across search engines and social media platforms. They offer features like ad creation, targeting options, and performance tracking. Examples include Google Ads, Facebook Ads, and LinkedIn Ads.

6. Analytics tools: These tools provide businesses with insights and data about their website traffic, user behavior, conversion rates, and more. Google Analytics is the most widely used analytics tool, but others like Adobe Analytics and Kissmetrics are also popular.

7. Customer relationship management (CRM) software: CRM tools help businesses manage their customer relationships, track interactions, and streamline sales processes. Examples include Salesforce, HubSpot CRM, and Zoho CRM.

8. Influencer marketing platforms: These platforms connect businesses with influencers who can help promote their products or services to their followers. Examples include Upfluence, AspireIQ, and GrapeVine.

9. Landing page builders: These tools allow businesses to create and optimize landing pages to drive conversions. They often provide templates, A/B testing, and analytics features. Examples include Unbounce, Leadpages, and Instapage.

10. Social listening tools: These tools monitor social media platforms for mentions of a brand, product, or industry-related keywords. They help businesses track their online reputation, identify trends, and engage with their audience. Examples include Brandwatch, Hootsuite Insights, and Mention.

These are just a few examples of the wide range of online marketing tools available today. The choice of tools depends on the specific needs and goals of a business. It's important to research and select the tools that align with the marketing strategy and budget of the organization.