*.Logging
slf4j, log4j, logback, jcl, log4jdbc
*.framework
spring
spring's samples: SpringSide, spring-petclinect
*.mvc
struts
*.test
junit, assertj, mockito, testNG, hamcrest
cobertura, 测试覆盖率
*.compile tool, VCS
ant, maven, gradle
git,subversion, cvs, p4
hudson
*.Db layer
hibernate, iBatis(myBatis), JPA, JDO, Toplink, ApacheOJB
apache dbcp, C3p0, proxool
*.web engine
tomcat, jetty
glassfish, jBoss
*.DBMS
hsqldb,mysql, mongoDB
*.AOP
Aspectj
*.xml
xdoclet, jfig
xstream, jaxb, xmlbean
*.byte-code
asm, apache bcel, serp
*.view and template
freemarker, velocity, Jexcel,
*.etc
quartz, 任务调度
sitemesh，
apache shiro， 一个安全框架
jackson
ehcache, 缓存
Kaptcha, 校验图片生成
Cargo, java打包工具，maven中有用。
joda, 时间日期库
rome，rss的一个框架
bootstraps，前端集
