| NKLFSysInfo | Utilities to get system information |
| CBatteryInfo | |
| C__klf_StrArg_MapOp | |
| CKLFAbstractPropertizedObject | An abstract object characterized by properties |
| CKLFAbstractPropertizedObjectSaver | Inherit this class to implement a custom saver for KLFAbstractPropertizedObjects |
| CKLFAdvancedConfigEditor | |
| CKLFColorChooser | |
| CKLFColorChooseWidget | |
| CKLFColorChooseWidgetPane | A pane displaying a gradient of colors, controlling one or two (arbitrary) components of a color |
| CKLFColorClickSquare | |
| CKLFColorComponentsEditorBase | Base utility class that stores and calculates specific components of a color that is being edited |
| CKLFColorComponentSpinBox | A Spin box editing a component of a color |
| CKLFColorDialog | A dialog to let the user select a color |
| CKLFConfigBase | |
| CObjConnection | |
| CKLFConfigProp | |
| CKLFConfigPropBase | |
| CKLFContainerSideWidgetManager | A generic container side widget show/hide manager (mac only) |
| CKLFDebugBlock | Utility to time the execution of a block |
| CKLFDebugBlockTimer | An extension of KLFDebugBlock with millisecond-time display |
| CKLFDebugObjectWatcher | |
| CKLFDelayedPleaseWaitPopup | A popup screen inviting user to wait, appearing after a delay |
| CKLFDisplayLabel | A label to display a LaTeX-formula-output-like image |
| CKLFDropDataHandler | An abstract handler for when data is dropped |
| CKLFEnumComboBox | Combo box proposing a list of (integer) enumeration values |
| CKLFEnumListWidget | |
| CItem | |
| CKLFEnumType | |
| CklfEqualFunc | Implements default equality tester with operator== |
| CKLFFactoryBase | Base class for factories |
| CKLFFactoryManager | A base abstract factory manager class |
| CKLFFloatSideWidgetManager | A Floating window show/hide manager |
| CKLFFlowLayout | A Layout that places widgets left to right, top to bottom |
| CKLFFlowListWidget | |
| CKLFGridFlowLayout | A Layout that lays out its children in a grid, flowing left to right, top to bottom |
| CKLFItemViewSearchTarget | A search target (for KLFSearchBar) for standard item views |
| CKLFIteratorSearchable | A Searchable object interface based on iterative searching |
| CKLFLatexEdit | A text edit field that edits latex code |
| CKLFLatexParenSpecs | |
| CParenSpec | |
| CParenModifierSpec | |
| CKLFLatexSyntaxHighlighter | |
| CParsedBlock | |
| CKLFMacAutoReleaseBlock | |
| CKLFMapInitData | |
| CKLFPathChooser | A widget comprising of a line edit and a "browse" button |
| CKLFPixmapButton | |
| CKLFPleaseWaitPopup | A popup screen inviting the user to wait |
| CKLFPObjEditWidget | |
| CKLFPObjPropRef | |
| CKLFPObjPropRefHelper | |
| CKLFPObjRegisteredType | |
| CKLFPointerGuard | |
| CKLFPosSearchable | An object that can be searched with a KLFSearchBar |
| CPos | An abstract position in a searchable object |
| CPosData | A Base class for storing abstract position data |
| CKLFPosSearchableProxy | |
| CKLFProgErr | |
| CKLFProgressDialog | A Progress Dialog |
| CKLFProgressReporter | Object that emits progress information of a (lengthy) operation |
| CKLFPropertizedObject | A class that holds properties |
| CKLFRefPtr | Stores a pointer to an object with refcount |
| CKLFRelativeFont | |
| CKLFRelativeFontBase | |
| CKLFSearchable | An interface for objects that can be I-searched with a KLFSearchBar (OBSOLETE) |
| CKLFSearchableProxy | A proxy class that relays search queries to another searchable object (OBSOLETE) |
| CKLFSearchBar | An Search Bar for Incremental Search |
| CKLFShowHideSideWidgetManager | A show-widget/hide-widget side widget show/hide manager |
| CKLFSideWidget | A widget that can be shown or hidden, that expands a main widget, e.g. klatexformula expanded mode |
| CKLFSideWidgetManagerBase | Abstract core functionality of showing/hiding a KLFSideWidget |
| CKLFSideWidgetManagerFactory | A factory for creating side widget managers |
| CKLFSpecifyableRegisteredType | |
| CKLFSpecifyableType | |
| CklfStrCaseEqualFunc | Implements an equality tester between strings |
| CKLFSyncGuardPtr | Store a guarded pointer, synchronizing other copies of this pointer |
| CKLFTarget | |
| CKLFTargeter | |
| CKLFToolsDesPlugin | |
| CKLFUnitChooser | A combo box to select a unit for measures |
| CUnit | |
| CKLFUnitSpinBox | A spin box that can display values in different units |
| CKLFVariantConverter | |
| CKLFVariantConverter< QList< T > > | |
| CKLFVariantConverter< QTextCharFormat > | |
| CKLFWaitAnimationOverlay | An animation display |
| CKLFWindowGeometryRestorer | Helper class that restores window geometry after show/hide events |
| CQtColorTriangle | Triangular color selection widget |