FileSync plugin for Eclipse is a file synchronisation tool. The main goal is to keep files outside of Eclipse projects in-sync with Eclipse project files. The plugin works as builder in Eclipse and will synchronize all changes on Eclipse project files to mapped external folders. E.g. if a file is created, changed or deleted in Eclipse, then the mapped (external) file will be created, changed or deleted too. Please note, that synchronization works is only in one direction - from Eclipse to the rest of the world.
The Animal Sniffer Plugin is used to build signatures of APIs and to check your classes against previously generated signatures. This plugin is called animal sniffer because the principal signatures that are used are those of the Java Runtime, and since Sun traditionally names the different versions of its Java Runtimes after different animals, the plugin that detects what Java Runtime your code requires was called "Animal Sniffer".
J. Teevan, S. Dumais, D. Liebling, und R. Hughes. UIST '09: Proceedings of the 22nd annual ACM symposium on User interface software and technology, Seite 237--246. New York, NY, USA, ACM, (2009)