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new file mode 100644
index 0000000..be73003
--- /dev/null
+++ b/diffy/Cargo.lock
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new file mode 100644
index 0000000..0fab511
--- /dev/null
+++ b/diffy/Cargo.toml
@@ -0,0 +1,10 @@
+[package]
+name = "diffy"
+version = "0.1.0"
+authors = ["Hatter Jiang <jht5945@gmail.com>"]
+edition = "2018"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+diffy = "0.1.1"
diff --git a/diffy/src/main.rs b/diffy/src/main.rs
new file mode 100644
index 0000000..adcbfcb
--- /dev/null
+++ b/diffy/src/main.rs
@@ -0,0 +1,16 @@
+use diffy::PatchFormatter;
+
+const A: &str = r##"
+hello world
+hatter
+"##;
+const B: &str = r##"
+hello world
+hatterj
+"##;
+
+fn main() {
+    let patch = diffy::create_patch(A, B);
+    let f = PatchFormatter::new().with_color();
+    print!("{}", f.fmt_patch(&patch));
+}
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new file mode 100644
index 0000000..9ffd99a
--- /dev/null
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diff --git a/prettydiff/Cargo.toml b/prettydiff/Cargo.toml
new file mode 100644
index 0000000..61f6c43
--- /dev/null
+++ b/prettydiff/Cargo.toml
@@ -0,0 +1,11 @@
+[package]
+name = "prettydiff"
+version = "0.1.0"
+authors = ["Hatter Jiang <jht5945@gmail.com>"]
+edition = "2018"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+prettydiff = "0.3.1"
+
diff --git a/prettydiff/src/main.rs b/prettydiff/src/main.rs
new file mode 100644
index 0000000..20fbb6a
--- /dev/null
+++ b/prettydiff/src/main.rs
@@ -0,0 +1,15 @@
+use prettydiff::diff_slice;
+
+// https://github.com/romankoblov/prettydiff
+fn main() {
+  println!("Diff: {}", diff_slice(&[1, 2, 3, 4, 5, 6], &[2, 3, 5, 7]));
+  println!(
+      "Diff: {}",
+      diff_slice(&["q", "a", "b", "x", "c", "d"], &["a", "b", "y", "c", "d", "f"])
+  );
+  println!(
+      "Diff: {}",
+      diff_slice(&["a", "c", "d", "b"], &["a", "e", "b"])
+  );
+}
+