Conversation Topics (Learn English Today) - Conversation topics suitable for intermediate learners of English.
Conversation Topics (Engoo) - These lessons offer students a chance to express their personal opinions and beliefs on a variety of topics.
ESL Discussion Topics - Can be sorted by CEFR skill level
ESL Conversation Topics and Questions - Numerous topics at various skill levels.
Literacy Resources for Adult ESOL and ABE Educators: Conversation Guides