diff --git a/docs/bipack.md b/docs/bipack.md
index 1f2e769..e0c2a43 100644
--- a/docs/bipack.md
+++ b/docs/bipack.md
@@ -1,6 +1,13 @@
 # Module mp_bintools
 
-This library contains a `Bipack` binary format serializer, see [net.sergeych.bipack.BipackEncoder] and [net.sergeych.bipack.BipackDecoder]. Also, there are many general-purpose utilities that simplify binary data processing, see package [net.sergeych.bintools] below. 
+## Collection of binary tools
+
+Most interesting:
+
+- Full set of CRC: [net.sergeych.bintools.CRC]
+- Binary bit-effective __BiPack format__ serializer: [net.sergeych.bipack.BipackEncoder] and [net.sergeych.bipack.BipackDecoder]. Also typed key-value storage for it, see [net.sergeych.bipack.KVStorage] and its delegates and [net.sergeych.bipack.defaultNamedStorage].
+- Multiplatform synchronization tools, that works the same and properly on JS, native and JVM, see [net.sergeych.synctools]
+- many general-purpose utilities that simplify binary data processing, see package [net.sergeych.bintools] below. 
 
 
 # Package net.sergeych.bipack
@@ -16,4 +23,10 @@ There are also special annotation to fine tune the format: [Extendable], [Framed
 
 General-purpose binary tools: encoding to bytes, hex, binary dumps. variable length integer, ect. Most of it is used internally by bipack serializers, see [net.sergeych.bipack] for details.
 
-In particular, see [Varint] and [Smartint] variable-length compact integer codecs and also [DataSource] and [DataSink] multiplatform synchronous read/write interfaces.
\ No newline at end of file
+In particular, see [Varint] and [Smartint] variable-length compact integer codecs and also [DataSource] and [DataSink] multiplatform synchronous read/write interfaces.
+
+# Package net.sergeych.synctools
+
+To write a code that compiles and runs, and most likely works on the
+JS, native, and JVM, we need some portable/compatible synchronization 
+primitives. This package is a collection of such.
\ No newline at end of file
diff --git a/src/commonMain/kotlin/net.sergeych.bintools/DataKVStorage.kt b/src/commonMain/kotlin/net.sergeych.bintools/DataKVStorage.kt
index 39d9d6b..e0fa2a6 100644
--- a/src/commonMain/kotlin/net.sergeych.bintools/DataKVStorage.kt
+++ b/src/commonMain/kotlin/net.sergeych.bintools/DataKVStorage.kt
@@ -2,9 +2,9 @@ package net.sergeych.bintools
 
 import net.sergeych.bipack.BipackDecoder
 import net.sergeych.bipack.BipackEncoder
+import net.sergeych.synctools.ProtectedOp
 import net.sergeych.synctools.WaitHandle
-import net.sergeych.tools.ProtectedOp
-import net.sergeych.tools.withLock
+import net.sergeych.synctools.withLock
 
 class DataKVStorage(private val provider: DataProvider) : KVStorage {
 
diff --git a/src/commonMain/kotlin/net/sergeych/synctools/AtomicCounter.kt b/src/commonMain/kotlin/net/sergeych/synctools/AtomicCounter.kt
index 80c625f..abbc8e2 100644
--- a/src/commonMain/kotlin/net/sergeych/synctools/AtomicCounter.kt
+++ b/src/commonMain/kotlin/net/sergeych/synctools/AtomicCounter.kt
@@ -1,4 +1,4 @@
-package net.sergeych.tools
+package net.sergeych.synctools
 
 /**
  * Thread-safe multiplatform counter
diff --git a/src/commonMain/kotlin/net/sergeych/synctools/AtomicValue.kt b/src/commonMain/kotlin/net/sergeych/synctools/AtomicValue.kt
index 3fa79ea..49cf98e 100644
--- a/src/commonMain/kotlin/net/sergeych/synctools/AtomicValue.kt
+++ b/src/commonMain/kotlin/net/sergeych/synctools/AtomicValue.kt
@@ -1,4 +1,4 @@
-package net.sergeych.tools
+package net.sergeych.synctools
 
 /**
  * Multiplatform (JS and battery included) atomically mutable value.
diff --git a/src/commonMain/kotlin/net/sergeych/synctools/ProtectedOp.kt b/src/commonMain/kotlin/net/sergeych/synctools/ProtectedOp.kt
index aca0823..f76f841 100644
--- a/src/commonMain/kotlin/net/sergeych/synctools/ProtectedOp.kt
+++ b/src/commonMain/kotlin/net/sergeych/synctools/ProtectedOp.kt
@@ -1,4 +1,4 @@
-package net.sergeych.tools
+package net.sergeych.synctools
 
 import kotlin.contracts.ExperimentalContracts
 import kotlin.contracts.InvocationKind
diff --git a/src/jsMain/kotlin/net/sergeych/synctools/ProtectedOp.js.kt b/src/jsMain/kotlin/net/sergeych/synctools/ProtectedOp.js.kt
index 82ec7b8..8c0e703 100644
--- a/src/jsMain/kotlin/net/sergeych/synctools/ProtectedOp.js.kt
+++ b/src/jsMain/kotlin/net/sergeych/synctools/ProtectedOp.js.kt
@@ -1,4 +1,4 @@
-package net.sergeych.tools
+package net.sergeych.synctools
 
 /**
  * JS is single-threaded, so we don't need any additional protection:
diff --git a/src/jvmMain/kotlin/net/sergeych/synctools/ProtectedOp.jvm.kt b/src/jvmMain/kotlin/net/sergeych/synctools/ProtectedOp.jvm.kt
index ccc8e1d..18cdd15 100644
--- a/src/jvmMain/kotlin/net/sergeych/synctools/ProtectedOp.jvm.kt
+++ b/src/jvmMain/kotlin/net/sergeych/synctools/ProtectedOp.jvm.kt
@@ -1,4 +1,4 @@
-package net.sergeych.tools
+package net.sergeych.synctools
 
 import java.util.concurrent.locks.ReentrantLock
 
diff --git a/src/nativeMain/kotlin/net/sergeych/synctools/ProtectedOp.native.kt b/src/nativeMain/kotlin/net/sergeych/synctools/ProtectedOp.native.kt
index 78f6279..6ce1e55 100644
--- a/src/nativeMain/kotlin/net/sergeych/synctools/ProtectedOp.native.kt
+++ b/src/nativeMain/kotlin/net/sergeych/synctools/ProtectedOp.native.kt
@@ -1,4 +1,4 @@
-package net.sergeych.tools
+package net.sergeych.synctools
 
 import kotlinx.atomicfu.locks.ReentrantLock