Smallpdf - PDF document management and conversion suite
Netbeans - NetBeans IDE 7.0. Develop desktop, mobile and web applications with Java, PHP, C/C++ and more. Runs on Windows, Linux, Mac OS X and Solaris. NetBeans IDE is open-source and free.
iLovePDF - Free online PDF tool set
Eclipse - Eclipse is an open source community, whose projects are focused on building an open development platform comprised of extensible frameworks, tools and runtimes for building, deploying and managing software across the lifecycle.
Kingshiper Image Compressor - With Kingshiper Image Compressor, you can easily compress, optimize and reduce jpg, jpeg, png, svg and gif file to a smaller size in seconds.
IntelliJ IDEA - Capable and Ergonomic IDE for JVM