table.md

Name	Description
Apache Camel	Camel is an Open Source integration framework that empowers you to quickly and easily integrate various systems consuming or producing data.
Apache Commons Lang	My fav : StringUtils.
Axon Framework	One of the best libraries for you to learn DDD, CQRS, Event-Sourcing
Caffeine	A high performance, near optimal caching library based on Java 8 and a faster replacement of Guava Cache.
Camunda BPM	My initial impression is easier to use than Activiti
Content Services for Spring	Cloud-Native Content Management Extensions for Spring.
cron-utils	Define, parse, validate, migrate crons as well as get human readable descriptions for CRON expressions.
EasyExcel	Allows you to import/export Excel with annotations.
Easy Rules	Simple, stupid rules engine for Java. Do take note that as of December 2020, Easy Rules is in maintenance mode.
Faker	Helps to generate fake data.
Guava	Interesting classes include Graphs, Multiset, Multimap, Table.
Immutables	Immutables generates simple, safe, and consistent value objects (data classes).
Java JWT	A Java implementation of JSON Web Token (JWT) - RFC 7519.
Kafka	Alternative to MQ.
Liquibase	Use to keep track of database objects.
Lombok	Aims to start with @Builder(toBuilder=true), @Getter.
MapStruct	Java bean mapping. take note to use with care with Lombok.
MongoDB Java Server	Fake implementation of the core MongoDB server in Java that can be used for integration tests.
Mybatis	Yes, it can work hand in hand with Spring Data.
MyBatis Pagination - PageHelper	Mybatis pagination.
Native Criteria	Ultra lightweight library to generate dynamic SQL based on hibernate session.
Poiji	Allows you to import Excel with annotations only
Problems for Spring	One of the library must have with Spring Reactive. It allows Spring Web MVC's exception or Spring Web Flux's exception handling to work seamlessly together, while requiring minimal additional developer effort.
Quartz	Java Job Scheduling library.
specification-arg-resolver	Alternative API for filtering data with Spring MVC & Spring Data JPA.
Spock	Spock is a testing and specification framework written in Groovy. Probably the best way to write tests in Java. If not using JUnit5.
spring-retry	Provides declarative retry support for Spring applications. It is used in Spring Batch, Spring Integration, and others. Imperative retry is also supported for explicit usage. Article Adding Retry Logic To Your API Calls in Spring Boot
Univocity	One of the best CSV, TSV parser. Allows you to import/export with annotations. Do take note it is not compatible with Lombok's builder.
UUID Generator	UUID generator. Can choose a couple of ways to generate UUID.
Vavr	Object functional for Java. Used to complement Java streams. Especially nice to use with Spring Reactive.