Headspace is a guided meditation app that promotes mindfulness. Most of the content requires a subscription, but there are several guided meditation recordings available free.
Buddhify is an app (iOS and Android) provides categorized meditations based on what you’re doing or how you’re feeling, such as: walking, stress, difficult emotions, work break, going to sleep or waking up.
Calm provides daily meditations through their web-based tool and app (iOS and Android) for reducing stress and anxiety, better sleep, managing emotions, and more. This tool is built for beginners and experienced meditators alike.