Here is a list of all files with brief descriptions:

Adjustment.cs
Assets.cs
AudioSourceManager.cs
CameraAnimation.cs
CameraExtensions.cs
ColorAnimation.cs
ComponentExtensions.cs
ConsoleInGame/Console.cs
EditorTweaks/Console.cs
ConsoleGUI.cs
ConsoleTextUI.cs
ConsoleTMP.cs
DebugEssentials.cs
DebugExtensions.cs
DoN.cs
DoOnce.cs
EnforcePresetPerFolder.cs
EssentialsHelp.cs
FlipFlop.cs
FloatAnimation.cs
FloatExtensions.cs
GameObjectExtensions.cs
HierarchyDividers.cs
IAdjustment.cs
ICollectionExtensions.cs
IEnumerableExtensions.cs
IntAnimation.cs
IntExtensions.cs
ISimpleAnimation.cs
LayerMaskExtensions.cs
MathfExtensions.cs
MeshRendererExtensions.cs
MinMax01.cs
PoolEssentials.cs
PresetsTools.cs
QuickSearch.cs
RandomEssentials.cs
RectTransformAnimation.cs
RectTransformExtensions.cs
Save.cs
SaveDataManager.cs
SavedData.cs
SD_Encoder.cs
SD_JsonSerializer.cs
Sequence.cs
SerializedPropertyExtensions.cs
SettingsWindow.cs
SimpleAnimation.cs
SimpleAnimationsManager.cs
SimpleAnimationsManagerInspector.cs
StringExtensions.cs
SuppressionOfWarningCS0649.cs
TransformAnimation.cs
TransformExtensions.cs
TypeSerializable.cs
Utils.cs
Vector2Animation.cs
Vector3Animation.cs
VectorExtensions.cs
VectorIntExtensions.cs