diff --git a/Package.swift b/Package.swift
index 8cd7e63..4304c7e 100644
--- a/Package.swift
+++ b/Package.swift
@@ -8,22 +8,23 @@ let package = Package(
         .library(
             name: "SwiftLibs",
             targets: [
-                "SwiftLibs"
+                "Core"
             ]
         ),
     ],
     dependencies: [],
     targets: [
         .target(
-            name: "SwiftLibs",
+            name: "Core",
             dependencies: [
             ]
         ),
         .testTarget(
-            name: "SwiftLibsTests",
+            name: "CoreTests",
             dependencies: [
-                "SwiftLibs"
-            ]
+                "Core"
+            ],
+            path: "Tests/Core"
         ),
     ]
 )
diff --git a/Sources/Core/Extensions/Bool+Init.swift b/Sources/Core/Extensions/Bool+Init.swift
new file mode 100644
index 0000000..f006647
--- /dev/null
+++ b/Sources/Core/Extensions/Bool+Init.swift
@@ -0,0 +1,37 @@
+//
+//  Bool+Init.swift
+//  Core
+//
+//  Created by Javier Cicchelli on 15/04/2023.
+//  Copyright © 2023 Röck+Cöde. All rights reserved.
+//
+
+public extension Bool {
+    
+    // MARK: Initialisers
+
+    /// Initialise a boolean primitive out of a given string.
+    /// - Parameter string: A string to initialise the boolean with.
+    init(_ string: String) {
+        let strings: [String] = [
+            .Constants.oneNumber,
+            .Constants.oneWord,
+            .Constants.true,
+            .Constants.yes
+        ]
+        
+        self = strings.contains(string.lowercased())
+    }
+    
+}
+
+// MARK: - String+Constants
+
+private extension String {
+    enum Constants {
+        static let yes = "yes"
+        static let `true` = "true"
+        static let oneWord = "one"
+        static let oneNumber = "1"
+    }
+}
diff --git a/Sources/Core/Extensions/String+Empty.swift b/Sources/Core/Extensions/String+Empty.swift
new file mode 100644
index 0000000..186ae1e
--- /dev/null
+++ b/Sources/Core/Extensions/String+Empty.swift
@@ -0,0 +1,24 @@
+//
+//  String+Empty.swift
+//  Core
+//
+//  Created by Javier Cicchelli on 15/04/2023.
+//  Copyright © 2023 Röck+Cöde. All rights reserved.
+//
+
+public extension String {
+    
+    // MARK: Properties
+    
+    /// Represents an empty string.
+    static let empty = ""
+    
+    // MARK: Functions
+    
+    /// Checks whether a string is not empty.
+    /// - Returns: A boolean value that represents whether the string is not empty.
+    func isNotEmpty() -> Bool {
+        isEmpty == false
+    }
+    
+}
diff --git a/Sources/SwiftLibs/SwiftLibs.swift b/Sources/SwiftLibs/SwiftLibs.swift
deleted file mode 100644
index 8c48b67..0000000
--- a/Sources/SwiftLibs/SwiftLibs.swift
+++ /dev/null
@@ -1,6 +0,0 @@
-public struct SwiftLibs {
-    public private(set) var text = "Hello, World!"
-
-    public init() {
-    }
-}
diff --git a/Tests/Core/Extensions/Bool+InitTests.swift b/Tests/Core/Extensions/Bool+InitTests.swift
new file mode 100644
index 0000000..390e057
--- /dev/null
+++ b/Tests/Core/Extensions/Bool+InitTests.swift
@@ -0,0 +1,60 @@
+//
+//  Bool+InitTests.swift
+//  Core
+//
+//  Created by Javier Cicchelli on 15/04/2023.
+//  Copyright © 2023 Röck+Cöde. All rights reserved.
+//
+
+import Core
+import XCTest
+
+final class Bool_InitTests: XCTestCase {
+    
+    // MARK: Properties
+    
+    private var strings: [String] = []
+    private var booleans: [Bool] = []
+
+    // MARK: Tests
+    
+    func test_init_withPositiveStrings() {
+        // GIVEN
+        strings = ["YES", "Yes", "yes", "TRUE", "TrUe", "true", "One", "OnE", "one", "1"]
+        
+        // WHEN
+        booleans = strings.map(Bool.init)
+        
+        // THEN
+        booleans.forEach { boolean in
+            XCTAssertTrue(boolean)
+        }
+    }
+    
+    func test_init_withNegativeStrings() {
+        // GIVEN
+        strings = ["NO", "No", "no", "FALSE", "FaLsE", "false", "ZERO", "ZeRo", "zero", "0"]
+        
+        // WHEN
+        booleans = strings.map(Bool.init)
+        
+        // THEN
+        booleans.forEach { boolean in
+            XCTAssertFalse(boolean)
+        }
+    }
+    
+    func test_init_withOtherStrings() {
+        // GIVEN
+        strings = [.empty, "...", "something", "yes-", "false+", "X", "9"]
+        
+        // WHEN
+        booleans = strings.map(Bool.init)
+        
+        // THEN
+        booleans.forEach { boolean in
+            XCTAssertFalse(boolean)
+        }
+    }
+
+}
diff --git a/Tests/Core/Extensions/String+EmptyTests.swift b/Tests/Core/Extensions/String+EmptyTests.swift
new file mode 100644
index 0000000..8639c44
--- /dev/null
+++ b/Tests/Core/Extensions/String+EmptyTests.swift
@@ -0,0 +1,55 @@
+//
+//  String+EmptyTests.swift
+//  Core
+//
+//  Created by Javier Cicchelli on 15/04/2023.
+//  Copyright © 2022 Röck+Cöde. All rights reserved.
+//
+
+import Core
+import XCTest
+
+final class String_EmptyTests: XCTestCase {
+
+    // MARK: Tests
+
+    func test_empty() {
+        // GIVEN
+        let string = String.empty
+        
+        // WHEN
+        // THEN
+        XCTAssertEqual(string, "")
+    }
+    
+    func test_isNotEmpty_withEmptyString() {
+        // GIVEN
+        let string = String.empty
+        
+        // WHEN
+        let result = string.isNotEmpty()
+        
+        // THEN
+        XCTAssertFalse(result)
+    }
+    
+    func test_isNotEmpty_withFilledString() {
+        // GIVEN
+        let string = String.Test.string
+        
+        // WHEN
+        let result = string.isNotEmpty()
+        
+        // THEN
+        XCTAssertTrue(result)
+    }
+
+}
+
+// MARK: - String+Constants
+
+private extension String {
+    enum Test {
+        static let string = "Some test string..."
+    }
+}
diff --git a/Tests/SwiftLibsTests/SwiftLibsTests.swift b/Tests/SwiftLibsTests/SwiftLibsTests.swift
deleted file mode 100644
index 11d5b96..0000000
--- a/Tests/SwiftLibsTests/SwiftLibsTests.swift
+++ /dev/null
@@ -1,11 +0,0 @@
-import XCTest
-@testable import SwiftLibs
-
-final class SwiftLibsTests: XCTestCase {
-    func testExample() throws {
-        // This is an example of a functional test case.
-        // Use XCTAssert and related functions to verify your tests produce the correct
-        // results.
-        XCTAssertEqual(SwiftLibs().text, "Hello, World!")
-    }
-}