Alphabet Series Readers (from Recipe for Reading) - click here for brochure including scope and sequence
Core Knowledge Readers - these readers are part of the Skills Strand of the Language Arts program of the Core Knowledge Curriculum. They are available for FREE download here (look for the reader in each grade/unit). Printed copies are available only for purchase in the U.S.
High Noon Books offers a selection of phonics-based chapter books.
Readinga-z.com offers short, downloadable, decodable readers. Membership subscription. A free 14 day trial is available.
Emily Gibbons decodable reading passages (5 levels) - available on Teachers Pay Teachers. One page decodable passages. Scope and sequence is provided at the beginning of each level.