softwaremill/magnolia

Easy, fast, transparent generic derivation of typeclass instances

scala-hamsters/hamsters

A mini Scala utility library

erikerlandson/coulomb

coulomb: unit analysis for Scala

vpavkin/dtc

Provides type classes for datetime values. Works both on JVM & ScalaJS.

dmytromitin/auxify

Introduces macro/meta annotations @ aux, @ self, @ instance, @ apply, @ delegated, @ syntax and String-based type class LabelledGeneric

propensive/adversaria

Typeclass interfaces to access user-defined Scala annotations

laserdisc-io/log-effect

A simple macro-less logging typeclass with some common backends

tmccarthy/bfect

Some bifunctor IO type classes

afsalthaj/safe-string-interpolation

A type driven approach to string interpolation, aiming at consistent, secure, and only-human-readable logs and console outputs !

data-tools/big-data-types

A library to transform Scala product types and Schemas from different databases into other Schemas. Any implemented type gets automatically methods to convert it into the rest of the types and vice versa. For example, an Spark Schema can be transformed into a BigQuery table.

medeia/medeia

A BSON libary for scala using typeclasses

ctongfei/poly-algebra

Generic math programming and algebraic typeclass abstractions for Scala

kevin-lee/logger-f

logger-f, Logger for F[_]

arainko/bencode

Typesafe and semi-automatically derived bencode encoders/decoders

reactivecore/cassandra_caseclass_adapter

Automatic Adapter for Scala Case classes to Java Cassandra Driver

sake92/tupson

Stupid simple Scala 3 library for writing and reading JSON

yangzai/spark-typeclass

Cats typeclass instances for Apache Spark

dmytromitin/shapeless-circe-patched-type-keytag

https://stackoverflow.com/questions/74384745/encoding-decoding-a-field-with-any-datatype-assigned-with-value-none-in-scala

sweet-delights/delightful-typeclasses

A Scala library containing utility typeclasses