sc-im

sc‑im is an ncurses‑based spreadsheet calculator that adopts Vim‑style navigation and editing commands. It presents a grid of cells that can hold numbers or text, supporting undo/redo, cell shifting, sorting, filtering, and subtotals. The interface allows direct color customization, bold/italic/underline formatting, and wide‑character text in many alphabets, while also offering clipboard integration and GNUPlot interaction for visualizing data.

The tool can import and export a range of formats, including CSV, tab‑delimited, XLSX, ODS, and Markdown, and it can be scripted with Lua for extended functionality or used as a non‑interactive calculator invoked from external scripts. Optional features such as Lua scripting, external function linking, and plot generation are enabled through additional libraries.

Designed for users comfortable with command‑line environments, sc‑im targets developers and power users who need a lightweight, Vim‑like spreadsheet experience without a graphical UI. It runs on Unix‑like systems with ncurses, gcc, and make, and can be installed via package managers or built from source.