Japanese Integrated Learning Tool

Jilt is an add-on to Writer. It includes a Japanese-English dictionary and a kanji dictionary.
It has powerful searches the result of which is configurable just by choosing the right command.
The user can easily add notes (in text or at page foot) .

Italian Spellchecker

This extension contains the Italian dictionary, thesaurus and hyphenation patterns contributed by volunteers and packaged by PLIO, http://www.plio.it.

Italian & Latin Spellchecker

[en] Italian and Latin spelling dictionaries - [de] Italienische und lateinische Rechtschreibung

Irish Spellchecker

This extension installs resources for the Irish language: a spell checker (GaelSpell), a thesaurus, and rules for correct hyphenation of Irish words.

Interpolation for Calc

This Add-in contain functions to solve interpolations and extrapolation tasks.

Interpolation

Automatic Calculator for Interpolation

Interlingue Spellchecker

Spelling check and hyphenation rules for Interlingue (Occidental)

Instant Word count

Instant Word Count shows an window dialog that instantly counts the amount of words in your document.

Industrial icon theme

Icon theme as provided by LibreOffice in the past

indonesian thesaurus

indonesian thesaurus for libreoffice

Kamus Indonesia Spellchecker

This provides an Indonesian spell-checker and hyphenator for Libreoffice

Improved trend lines (CorelPolyGUI)

CorelPolyGUI plots extra trend lines such as linear and polynomial with forced intercept option, or moving average.

ImpressRunner

Allow to start automatically a presentation at loading

Import csv

Utility for opening and saving files (csv, txt)

ImgCell

ImgCell enables drop the image to fit the cell. This will scale the image to fit the bound cell.

iMath

The iMath extension for intelligent formulas enables numeric and symbolic calculations inside a Writer document

ILO - ITS Libre Office Writer Extension

The ILO extension offers the possibility to enrich documents with the second version of the W3C Internationalization Tag Set (ITS 2.0).
This W3C standard offers the possibility to add so call

Hyphenations for russian

Russian hyphenation dictionary converted from TEX hyphenation patterns. Словарь переносов для русского языка сконвертированный из шаблонов переносов TEX.

Icelandic Spellchecker

Developed by the hunspell-is project

High contrast icon theme

Hicontrast icon theme as shipped with LibreOffice before version 6.1

Hebrew Spellchecker

Hebrew dictionary for LibreOffice spell checker.

Hatch Patterns for Cells

This is a set of macros and a dialog which allows the appearance of Hatch patterns within cells.

GUI Widget Gallery

Everything you need to prototype GUI widgets.

Guarani Spellchecker

Guarani Dictionary and Thesaurus

Greek Polytonic Spellchecker

Πολυτονικὸς διορθωτὴς κειμένων σύμφωνος μὲ τὴν ἑλληνικὴ ἱστορικὴ ὀρθογραφία. Μία προσφορὰ τοῦ "The Polytonic Project".

grapheur-mecomsci

Grapheur-mecomsci génère des graphiques scientifiques d'apparence soignée

This extension allows you to create well formated graphic and allows you to draw a polynomial curve.

Grammalecte

French grammar checker

Grabritos para CD PIMACO

(en) Extension with a set of templates for PIMACO stickers. Includes CD template.
(pt) Extensão com um conjunto de modelos para adesivos PIMACO para CDs e rótulos diversos da linha 70XX.

goQR.me Integration

This extension integrates QR code API from goQR.me directly in LibreOffice.

gMailOOo

Google Mail OAuth2 implementation for LibreOffice