diff --git a/src/main.rs b/src/main.rs
index 73c70a0..a3091ec 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -4,6 +4,9 @@ use rouille::router;
 mod db;
 mod project;
 
+// Projects not modified in this many seconds are considered stale
+const STALE_AGE: i64 = 30 * 24 * 60 * 60; // 30 days in seconds
+
 fn main() {
     println!("Starting server on localhost:8080");
 
@@ -29,7 +32,17 @@ fn main() {
 fn display_projects() -> rouille::Response {
     let projects = db::list_all_projects().unwrap_or_default();
 
-    let active_projects: Vec<_> = projects.iter().filter(|p| !p.archived).collect();
+    let now = std::time::SystemTime::now()
+        .duration_since(std::time::UNIX_EPOCH)
+        .unwrap()
+        .as_secs() as i64;
+
+    let active_projects: Vec<_> = projects.iter()
+        .filter(|p| !p.archived && (now - p.last_modified_time) <= STALE_AGE)
+        .collect();
+    let stale_projects: Vec<_> = projects.iter()
+        .filter(|p| !p.archived && (now - p.last_modified_time) > STALE_AGE)
+        .collect();
     let archived_projects: Vec<_> = projects.iter().filter(|p| p.archived).collect();
 
     let markup = html! {
@@ -51,6 +64,17 @@ fn display_projects() -> rouille::Response {
                                 archived=(project.archived) {}
                         }
                     }
+                    details {
+                        summary { "Stale" }
+                        section {
+                            @for project in &stale_projects {
+                                project-card
+                                    title=(project.title)
+                                    percentage=(project.percentage_completed)
+                                    archived=(project.archived) {}
+                            }
+                        }
+                    }
                     details {
                         summary { "Archived" }
                         section {