Fast, lightweight Web framework based on Netty; without too much dependency, and the core jar package is only 30KB. Configuration files can also be read in multiple environments, just add VM parameters, also ensure that the parameter name and file name are consistent.
(Really) Thin HTTP Client: no https, small jar file size (never over 25kb), no dependencies (just jre1.6+ or jdk1.6+), can do POST and GET request methods, can send POST methods with multipart/form-data, can send request parameters and fast. Get it!