diff --git a/.gitignore b/.gitignore
new file mode 100644
index 00000000..83212ad0
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,7 @@
+/*.o
+/*.tmp
+/*.bin
+/*.iso
+/*.so
+/*.a
+builds
diff --git a/hello/.gitignore b/hello/.gitignore
new file mode 100644
index 00000000..92830b70
--- /dev/null
+++ b/hello/.gitignore
@@ -0,0 +1,7 @@
+*.o
+*.tmp
+*.bin
+*.iso
+*.so
+*.a
+hello
diff --git a/libmaxsi/.gitignore b/libmaxsi/.gitignore
new file mode 100644
index 00000000..22ca5c49
--- /dev/null
+++ b/libmaxsi/.gitignore
@@ -0,0 +1,10 @@
+*.o
+*.tmp
+*.bin
+*.iso
+*.so
+*.a
+# Ignore dynamically generated headers.
+/*.h
+c/h/*.h
+c/h/sys/*.h
diff --git a/sortix/.gitignore b/sortix/.gitignore
new file mode 100644
index 00000000..d21d179c
--- /dev/null
+++ b/sortix/.gitignore
@@ -0,0 +1,6 @@
+*.o
+*.tmp
+*.bin
+*.iso
+*.so
+*.a