diff --git a/.gitignore b/.gitignore
new file mode 100644
index 000000000..79d9e76d3
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,21 @@
+app/bin/
+app/pde.jar
+build/macosx/work/
+core/bin/
+core/core.jar
+hardware/arduino/bootloaders/caterina_LUFA/Descriptors.o
+hardware/arduino/bootloaders/caterina_LUFA/Descriptors.lst
+hardware/arduino/bootloaders/caterina_LUFA/Caterina.sym
+hardware/arduino/bootloaders/caterina_LUFA/Caterina.o
+hardware/arduino/bootloaders/caterina_LUFA/Caterina.map
+hardware/arduino/bootloaders/caterina_LUFA/Caterina.lst
+hardware/arduino/bootloaders/caterina_LUFA/Caterina.lss
+hardware/arduino/bootloaders/caterina_LUFA/Caterina.elf
+hardware/arduino/bootloaders/caterina_LUFA/Caterina.eep
+hardware/arduino/bootloaders/caterina_LUFA/.dep/
+build/windows/work/
+build/linux/work/
+build/linux/dist/*.tar.gz
+build/linux/*.tgz
+test-bin
+*.iml