This is my favorite recipe for simple knitted home slippers. I have written the pattern for chunky wool but it can easily be adapted to different yarn weights.
Easy Chunky Slippers Free Knitting Pattern + Video - Knitting Pattern
Knitgrammer - Nordic Knitting Patterns.
Interactive knitting patterns and calculators - Knitgrammer
11 Free Sock Knitting Patterns - Knitgrammer
Chunky Slipper Pattern (Free Knitting Pattern and Video) - Sheep and Stitch
Easy Slipper Knitting Patterns - In the Loop Knitting
Tuiki tuiki socks pattern by Ida-Maria Tyyskä
Easy Slipper Knitting Patterns - In the Loop Knitting
Ravelry: Basic Chunky Slipper pattern by Patons