SuperTab

supertab lets you drive completion with the Tab key instead of the default Ctrl-N/Ctrl-P, making insert-mode completion feel more natural. It can cycle through completion items and optionally fall back to indentation or other behaviors when no completion is available. The plugin plays nicely with omnifunc and user-defined completion sources, so language-specific engines or LSP-backed completions slot in seamlessly. Works with omnifunc and external completion sources or frameworks. You can configure direction, cycling, and how Tab behaves at line starts or after whitespace. It is intentionally small and focused, providing a thin layer over Vim’s completion to streamline everyday typing. Lightweight approach that keeps Vim’s native completion model. For many users, it becomes a muscle-memory improvement that speeds up coding with minimal configuration.