You can track affiliate commissions across different platforms using affiliate tracking software like Voluum, ClickMeter, or AffiliateWP. Voluum is a powerful tool for tracking affiliate campaigns and provides real-time reporting. ClickMeter allows you to monitor clicks, conversions, and commissions from multiple networks. AffiliateWP integrates well with WordPress and tracks affiliate performance in real-time. Other options include CJ Affiliate and ShareASale, which have built-in tracking features for their networks. You can also use Google Analytics to track affiliate links manually. These tools help you manage and track your affiliate commissions effectively across different platforms.