Some of the commonly used expected conditions of an element that can be used with explicit waits are-

• elementToBeClickable(WebElement element or By locator) - An expectation for checking an element is visible or not and enabled so that you can click on it.
• stalenessOf(WebElement element) - will Wait until an element is no longer ATTACHED to the DOM or TIMEOUT expires.
• visibilityOf(WebElement element) - visibilityOf(WebElement element) is used for checking that an element is present on the DOM of a page and visible.
• visibilityOfElementLocated(By locator) - Used to check if the element is present on the DOM of a page and it is visible.
• invisibilityOfElementLocated(By locator) - invisibilityOfElementLocated(By locator) used for checking an element is invisible or not present in the DOM.
• attributeContains(WebElement element, String attribute, String VALUE)  - Waits for a certain text fragment to appear in the attribute.
• alertIsPresent() - alertIsPresent(), accepts any present alert. and returns TRUE if there is an alert to click
• titleContains(String TITLE) -  titleContains(String title) used for checking that the title of a page contains a case-sensitive substring.
• titleIs(String title) - wait till the title of the page is the same as mentioned in the attribute. 
• textToBePresentInElementLocated(By, String) - wait till expected text appears on targeted element.