diff --git a/.gitmodules b/.gitmodules
index b61a6eaf411f..6721cb79e742 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -100,10 +100,6 @@
 [submodule "community-build/community-projects/requests-scala"]
 	path = community-build/community-projects/requests-scala
 	url = https://github.com/dotty-staging/requests-scala.git
-[submodule "community-build/community-projects/cats-effect-2"]
-	path = community-build/community-projects/cats-effect-2
-	url = https://github.com/dotty-staging/cats-effect.git
-	branch = series/2.x
 [submodule "community-build/community-projects/cats-effect-3"]
 	path = community-build/community-projects/cats-effect-3
 	url = https://github.com/dotty-staging/cats-effect.git
@@ -196,3 +192,12 @@
 [submodule "community-build/community-projects/scalatestplus-testng"]
 	path = community-build/community-projects/scalatestplus-testng
 	url = https://github.com/dotty-staging/scalatestplus-testng.git
+[submodule "community-build/community-projects/munit-cats-effect"]
+	path = community-build/community-projects/munit-cats-effect
+	url = https://github.com/dotty-staging/munit-cats-effect.git
+[submodule "community-build/community-projects/scalacheck-effect"]
+	path = community-build/community-projects/scalacheck-effect
+	url = https://github.com/dotty-staging/scalacheck-effect.git
+[submodule "community-build/community-projects/fs2"]
+	path = community-build/community-projects/fs2
+	url = https://github.com/dotty-staging/fs2.git
diff --git a/community-build/community-projects/cats b/community-build/community-projects/cats
index 2c27eb8b6fe5..878472d7bff4 160000
--- a/community-build/community-projects/cats
+++ b/community-build/community-projects/cats
@@ -1 +1 @@
-Subproject commit 2c27eb8b6fe567d5a7adcb8433646d6f718d3e94
+Subproject commit 878472d7bff4c3bfec8a265782c1e0d6a3147541
diff --git a/community-build/community-projects/cats-effect-2 b/community-build/community-projects/cats-effect-2
deleted file mode 160000
index f3d3bb3428fa..000000000000
--- a/community-build/community-projects/cats-effect-2
+++ /dev/null
@@ -1 +0,0 @@
-Subproject commit f3d3bb3428faa9b2495310dfd520844c37018042
diff --git a/community-build/community-projects/cats-effect-3 b/community-build/community-projects/cats-effect-3
index 04155e429e23..af11317d40ce 160000
--- a/community-build/community-projects/cats-effect-3
+++ b/community-build/community-projects/cats-effect-3
@@ -1 +1 @@
-Subproject commit 04155e429e230224e61235c4e4dd125419f82f7a
+Subproject commit af11317d40cee8979c4e40b60431bc0f3b9e03f0
diff --git a/community-build/community-projects/cats-mtl b/community-build/community-projects/cats-mtl
index 1b0d1404f0eb..7679d606336a 160000
--- a/community-build/community-projects/cats-mtl
+++ b/community-build/community-projects/cats-mtl
@@ -1 +1 @@
-Subproject commit 1b0d1404f0eb104e72d4fd80c4ba285c9390fbc0
+Subproject commit 7679d606336a4da0e6dfca43c0a481db273cc10c
diff --git a/community-build/community-projects/coop b/community-build/community-projects/coop
index d3bcd3622dc3..4babee9613a4 160000
--- a/community-build/community-projects/coop
+++ b/community-build/community-projects/coop
@@ -1 +1 @@
-Subproject commit d3bcd3622dc3a1f3257e2d861d724c04ab634b81
+Subproject commit 4babee9613a4bc0713d195676dd169c4f636a31a
diff --git a/community-build/community-projects/discipline b/community-build/community-projects/discipline
index 4e3f9678c847..b0865da0c5e0 160000
--- a/community-build/community-projects/discipline
+++ b/community-build/community-projects/discipline
@@ -1 +1 @@
-Subproject commit 4e3f9678c84702b079209ae9928d9b6c884a7514
+Subproject commit b0865da0c5e016ad1d45060f52885219256d3205
diff --git a/community-build/community-projects/discipline-munit b/community-build/community-projects/discipline-munit
index e0a3aee65b85..014f8ca26fef 160000
--- a/community-build/community-projects/discipline-munit
+++ b/community-build/community-projects/discipline-munit
@@ -1 +1 @@
-Subproject commit e0a3aee65b85bf8d6bb53037e4bc33ebfdeaedff
+Subproject commit 014f8ca26fefab7c32a2779b9d3382df14ccf860
diff --git a/community-build/community-projects/discipline-specs2 b/community-build/community-projects/discipline-specs2
index b2fa931a44ee..3603b0874940 160000
--- a/community-build/community-projects/discipline-specs2
+++ b/community-build/community-projects/discipline-specs2
@@ -1 +1 @@
-Subproject commit b2fa931a44eeb6a6afa1343e57f963e73aafff59
+Subproject commit 3603b08749404f83946aab48203f8bd9f9410b49
diff --git a/community-build/community-projects/fs2 b/community-build/community-projects/fs2
new file mode 160000
index 000000000000..bb69f51505d7
--- /dev/null
+++ b/community-build/community-projects/fs2
@@ -0,0 +1 @@
+Subproject commit bb69f51505d7871af318da56be5281f25fa6b5af
diff --git a/community-build/community-projects/munit-cats-effect b/community-build/community-projects/munit-cats-effect
new file mode 160000
index 000000000000..5a4ee90a625e
--- /dev/null
+++ b/community-build/community-projects/munit-cats-effect
@@ -0,0 +1 @@
+Subproject commit 5a4ee90a625e01c47421a17d1b093b2f27b9f2c5
diff --git a/community-build/community-projects/scalacheck b/community-build/community-projects/scalacheck
index ad6b6f997a91..976db31cd549 160000
--- a/community-build/community-projects/scalacheck
+++ b/community-build/community-projects/scalacheck
@@ -1 +1 @@
-Subproject commit ad6b6f997a9189dc9abdb187440cad4de5c33720
+Subproject commit 976db31cd549328167a90ecc6f5f31efa83cd845
diff --git a/community-build/community-projects/scalacheck-effect b/community-build/community-projects/scalacheck-effect
new file mode 160000
index 000000000000..a275735caed7
--- /dev/null
+++ b/community-build/community-projects/scalacheck-effect
@@ -0,0 +1 @@
+Subproject commit a275735caed75eeb49b8ba1c4ef85d72ca6b61d8
diff --git a/community-build/community-projects/scodec b/community-build/community-projects/scodec
index 84db5f776573..18047cac1feb 160000
--- a/community-build/community-projects/scodec
+++ b/community-build/community-projects/scodec
@@ -1 +1 @@
-Subproject commit 84db5f7765738024aebd8df2bf53151cc6d4d793
+Subproject commit 18047cac1febc840e03dee91a31183d64e632222
diff --git a/community-build/community-projects/scodec-bits b/community-build/community-projects/scodec-bits
index 85de35c014b9..d513312fbfc9 160000
--- a/community-build/community-projects/scodec-bits
+++ b/community-build/community-projects/scodec-bits
@@ -1 +1 @@
-Subproject commit 85de35c014b948f0dd3f94e975c42d17deab4055
+Subproject commit d513312fbfc9fd54d0d3cde914b37e7755f7f6f4
diff --git a/community-build/community-projects/simulacrum-scalafix b/community-build/community-projects/simulacrum-scalafix
index 75f7e10d30fb..2515271c46ad 160000
--- a/community-build/community-projects/simulacrum-scalafix
+++ b/community-build/community-projects/simulacrum-scalafix
@@ -1 +1 @@
-Subproject commit 75f7e10d30fb1b848b7adaf2a026320ee548b56a
+Subproject commit 2515271c46ad46512a43d20e1e8ae0793433cf0b
diff --git a/community-build/src/scala/dotty/communitybuild/projects.scala b/community-build/src/scala/dotty/communitybuild/projects.scala
index 106952d1cb2a..70b7a474022d 100644
--- a/community-build/src/scala/dotty/communitybuild/projects.scala
+++ b/community-build/src/scala/dotty/communitybuild/projects.scala
@@ -426,7 +426,6 @@ object projects:
     sbtPublishCommand = "coreJVM/publishLocal;coreJS/publishLocal",
     sbtDocCommand   = "coreJVM/doc",
     dependencies = List(munit),
-    requiresExperimental = true,
   )
 
   lazy val scodec = SbtCommunityProject(
@@ -435,7 +434,6 @@ object projects:
     // Adds <empty> package
     sbtDocCommand   = "coreJVM/doc",
     dependencies = List(munit, scodecBits),
-    requiresExperimental = true,
   )
 
   lazy val scalaParserCombinators = SbtCommunityProject(
@@ -477,16 +475,10 @@ object projects:
     sbtDocCommand = ";json-schemaJVM/doc ;algebraJVM/doc; openapiJVM/doc; http4s-server/doc ;http4s-client/doc ;play-server/doc ;play-client/doc ;akka-http-server/doc ;akka-http-client/doc",
   )
 
-  lazy val catsEffect2 = SbtCommunityProject(
-    project        = "cats-effect-2",
-    sbtTestCommand = "test",
-    sbtDocCommand  = ";coreJVM/doc ;lawsJVM/doc",
-    dependencies   = List(cats, disciplineMunit)
-  )
-
   lazy val catsEffect3 = SbtCommunityProject(
     project        = "cats-effect-3",
     sbtTestCommand = "test",
+    sbtPublishCommand = "publishLocal",
     sbtDocCommand  = ";coreJVM/doc ;lawsJVM/doc ;kernelJVM/doc",
     dependencies   = List(cats, coop, disciplineSpecs2, scalacheck)
   )
@@ -520,7 +512,7 @@ object projects:
 
   lazy val disciplineMunit = SbtCommunityProject(
     project = "discipline-munit",
-    sbtTestCommand = "test",
+    sbtTestCommand = "coreJVM/test;coreJS/test",
     sbtPublishCommand = "coreJVM/publishLocal;coreJS/publishLocal",
     dependencies = List(discipline, munit)
   )
@@ -678,6 +670,27 @@ object projects:
     dependencies = List(scalatest, scalatestplusScalacheck),
   )
 
+  lazy val munitCatsEffect = SbtCommunityProject(
+    project = "munit-cats-effect",
+    sbtTestCommand = "ce3JVM/test; ce3JS/test",
+    sbtPublishCommand = "ce3JVM/publishLocal; ce3JS/publishLocal",
+    dependencies = List(munit, catsEffect3)
+  )
+
+  lazy val scalacheckEffect = SbtCommunityProject(
+    project = "scalacheck-effect",
+    sbtTestCommand = "test",
+    sbtPublishCommand = "publishLocal",
+    dependencies = List(cats, catsEffect3, munit, scalacheck)
+  )
+
+  lazy val fs2 = SbtCommunityProject(
+    project = "fs2",
+    sbtTestCommand = "coreJVM/test; coreJS/test",  // io/test requires JDK9+
+    sbtPublishCommand = "coreJVM/publishLocal; coreJS/publishLocal",
+    dependencies = List(cats, catsEffect3, munitCatsEffect, scalacheckEffect, scodecBits)
+  )
+
 end projects
 
 def allProjects = List(
@@ -721,7 +734,6 @@ def allProjects = List(
   projects.dottyCpsAsync,
   projects.scalaz,
   projects.endpoints4s,
-  projects.catsEffect2,
   projects.catsEffect3,
   projects.scalaParallelCollections,
   projects.scalaCollectionCompat,
@@ -750,6 +762,9 @@ def allProjects = List(
   projects.onnxScala,
   projects.playJson,
   projects.scalatestplusTestNG,
+  projects.munitCatsEffect,
+  projects.scalacheckEffect,
+  projects.fs2,
 )
 
 lazy val projectMap = allProjects.groupBy(_.project)
diff --git a/community-build/test/scala/dotty/communitybuild/CommunityBuildTest.scala b/community-build/test/scala/dotty/communitybuild/CommunityBuildTest.scala
index 5576b95afba5..06425cbe6ff9 100644
--- a/community-build/test/scala/dotty/communitybuild/CommunityBuildTest.scala
+++ b/community-build/test/scala/dotty/communitybuild/CommunityBuildTest.scala
@@ -114,15 +114,17 @@ end CommunityBuildTestA
 @Category(Array(classOf[TestCategory]))
 class CommunityBuildTestB extends CommunityBuildTest:
   @Test def cats = projects.cats.run()
-  @Test def catsEffect2 = projects.catsEffect2.run()
   @Test def catsEffect3 = projects.catsEffect3.run()
   @Test def catsMtl = projects.catsMtl.run()
   @Test def coop = projects.coop.run()
   @Test def discipline = projects.discipline.run()
   @Test def disciplineMunit = projects.disciplineMunit.run()
   @Test def disciplineSpecs2 = projects.disciplineSpecs2.run()
+  @Test def fs2 = projects.fs2.run()
   @Test def munit = projects.munit.run()
+  @Test def munitCatsEffect = projects.munitCatsEffect.run()
   @Test def perspective = projects.perspective.run()
+  @Test def scalacheckEffect = projects.scalacheckEffect.run()
   @Test def scodec = projects.scodec.run()
   @Test def scodecBits = projects.scodecBits.run()
   @Test def simulacrumScalafixAnnotations = projects.simulacrumScalafixAnnotations.run()