This site, Randall's ESL Cyber Listening Lab, has conversations at 3 levels: easy, medium and hard. It gives good practice with listening for information, listening for gist (overall understanding) and vocabulary practice.
This site has conversations with the transcripts so students can listen and read along, and then practice speaking.
This site is good for A1.1-A1.2 learners. There are stories that can be listened to. At the bottom of the page, there are various exercises.