diff --git a/README.md b/README.md
index 67724de..ac19889 100644
--- a/README.md
+++ b/README.md
@@ -1,6 +1,7 @@
 # Go Liquid Template Parser
+[![GoDoc](https://godoc.org/github.com/osteele/liquid?status.svg)](http://godoc.org/github.com/osteele/liquid)
 
-`goliquid` is a very early-stage Go implementation of the [Shopify Liquid template language](https://shopify.github.io/liquid), for use in [Gojekyll](https://github.com/osteele/gojekyll).
+`goliquid` is a pure Go implementation of [Shopify Liquid templates](https://shopify.github.io/liquid), for use in [gojekyll](https://github.com/osteele/gojekyll).
 
 ## Status
 [![Build Status](https://travis-ci.org/osteele/liquid.svg?branch=master)](https://travis-ci.org/osteele/liquid)
@@ -10,7 +11,7 @@
   - [x] Literals
     - [ ] String Escapes
   - [x] Variables
-  - [ ] Operators
+  - [ ] Operators (partial)
   - [x] Arrays
   - [ ] Whitespace Control
 - [ ] Tags
@@ -30,12 +31,10 @@
       - [ ] `tablerow`
       - [ ] `cycle`
   - [x] Raw
-  - [ ] Variable
+  - [ ] Variables
     - [x] Assign
     - [ ] Capture
-- [ ] Filters
-  - [x] some
-  - [ ] all
+- [ ] Filters (partial)
 
 ## Install
 
@@ -84,6 +83,16 @@ The [original Liquid engine](https://shopify.github.io/liquid), of course, for t
 
 (That said, this is a clean-room implementation to make sure it just implements the documented design.)
 
+## Other Implementations
+
+Go:
+
+* <https://godoc.org/github.com/karlseguin/liquid> is a partial implementation.
+* <https://godoc.org/github.com/acstech/liquid> is a more active fork of Karl Seguin's implementation.
+* <https://godoc.org/github.com/hownowstephen/go-liquid> is a more recent entry.
+
+<https://github.com/Shopify/liquid/wiki/Ports-of-Liquid-to-other-environments> lists ports to other languages.
+
 ## License
 
 MIT License
diff --git a/engine.go b/engine.go
index ba90a4f..ebc3f13 100644
--- a/engine.go
+++ b/engine.go
@@ -1,7 +1,9 @@
 /*
-Package liquid is a very early-stage pure Go library that implements Shopify Liquid <https://shopify.github.io/liquid> templates.
+Package liquid is a pure Go implementation of Shopify Liquid templates.
 
 It's intended for use in for use in https://github.com/osteele/gojekyll.
+
+See the project README https://github.com/osteele/liquid for additional information and implementation status.
 */
 package liquid