diff --git a/.gitignore b/.gitignore
new file mode 100644
index 000000000..f3b736a53
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,11 @@
+*/bin/
+com.ibm.wala.cast.js.rhino/lib/
+com.ibm.wala.cast.js/lib/
+com.ibm.wala.cast.java.polyglot/lib/
+com.ibm.wala.cast.java.test.data/src/JLex/
+.metadata/
+*~
+com.ibm.wala.cast.js.test/examples-src/ajaxslt/
+com.ibm.wala.core.testdata/@dot/
+com.ibm.wala.core.testdata/lib/
+com.ibm.wala.core/dat/wala.properties