Document Viewer is Lubuntu's
name for Evince - and it comes from their own motto; "Simply a
Document Viewer." The stated goal of Evince is to replace the many
other "portable" document viewers like gpdf and ggv with one,
all-encompassing document viewer. Of course the main format most users
need is the Portable Document Format, PDF. But Evince can
also view djvu, dvi, ps, tif and xps documents and well as comic book
formats; cb7, cbr, cbt and cbz.
Visit Evince's Live GNOME Home , FAQ and Wiki. Evince is free and open source software licensed under the GPL. Another app we include in the C4C Lubuntu ReSpin is called Xpdf; also free and open source software and also licensed under the GPL. Another good alternative document viewer is called Okular.
Note: Evince, Xpdf (and Okular) are PDF viewers. To create PDF files; the easiest option from most any application is Print-to-PDF. Many applications (some via plug-ins) export to PDF. In LibreOffice Writer; Go to File --> Export as PDF.
If you need to edit an already existing PDF file (meaning you don't have the original), there are applications that allow PDF editing / manipulation. Manipulate PDF files via the command line with PDFtk, or with a GUI interface with PDF-Shuffler. GIMP has native PDF support - also see Patrick Nagel's solution for multi-page PDF documents here. And LibreOffice has folded their PDF Importer into Draw, where many PDF files open and are editable.
GnuCash is financial
software featuring double-entry accounting, checkbook styled register,
scheduled transactions, reports, graphs and more. Easily import data
from on-line bank statements and other software packages using HBCI,
OFX and QIF files. GnuCash uses the double entry accounting system;
you will always keep at least two accounts balanced. Transfers of
money between accounts debit one and credit the other.
GnuCash divides financial data into files, accounts (checking, savings, credit cards, mortgage, loans...), and transactions (buying something, paying a bill, transferring money, depositing a check, withdrawing money...) stored as either a single XML file or SQL database (using SQLite3, MySQL or PostgreSQL) in five categories; assets, liabilities, equity, income and expenses. And GnuCash makes all this easy to set up and keep track of. You'll always have a good understanding of where you are financially.
GnuCash is free and open source software licensed under the GPL. The GnuCash.org
website features an Online Help Manual and a Tutorial and Concepts Guide. You may be
interested in this Church Accounting Using GnuCash Series on
Finance and Accounting for Churches Blog.
LibreOffice is a full-featured office suite of applications for text (Writer), spreadsheets (Calc), presentations (Impress), diagrams (Draw), and databases (Base). LibreOffice uses the ISO/IEC standard OpenDocument Format (ODF) as well as featuring full compatibility with literally dozens of other office suites (including Microsoft Office) and stand-alone applications. You can open, work with, save as, import and export to and from LaTex, HTML, StarOffice, PDF, WordPerfect, RTF, Google Docs, Xoho, WebDAV and much more.
Learn more at the LibreOffice Home. Check out Getting Started with LibreOffice from Open of Course, The Document Foundation's own Documentation as ODF and PDF files. Don't miss LibreOffice Extensions , Maco Tutorials from DebugPoint.com and LibreOffice Templates.
LIBREOFFICE AND MICROSOFT OFFICE
Microsoft file formats like doc and docx (Word), xls and xlsx (Excel), ppt and pptx (PowerPoint) can be opened, read, changed, and "saved as" in LibreOffice. However, the reverse is not always true. If the LibreOffice user plans to share files with a user of Microsoft Office (or, say print a file from work, turn in a school project electronically, or submit a resume in "Word"); they will probably need to "Save As..." their documents in corresponding Microsoft Office formats.
Writer > Word
Calc > Excel
Impress > PowerPoint
Base > Access
THE "CORE" MICROSOFT FONTS
Special attention should also be paid to the fonts used in LibreOffice documents destined to be opened in Microsoft Office. The "core" Microsoft fonts of Andale Mono, Arial, Arial Black, Comic Sans MS, Georgia, Impact, Tahoma, Times New Roman, Trebuchet, and Verdana are not included. However, these are freely available and easily installed (if you installed the lubuntu-restricted-extras, you now have these fonts).
Go to Menu --> Accessories --> LXTerminal
Type (or copy and paste):
sudo apt install
You will be required to agree to the Microsoft EULA. [Tab] to
<OK> then [Enter]. [Left Arrow] to <Yes> then [Enter]
MS Core Fonts after running updates to the OS
Base is a powerful database application. Single users have access to the HSQL relational database engine with data stored in the BASE file. Wizards help in the creation of tables, queries, forms and reports. Power users can connect to almost any database with native support drivers for MySQL, Adabas D, JDBC, ODBC, MS Access and PostgreSQL.
See the Base Homepage, Create a Database from BusinessProgrammer.com on YouTube, Getting Started with Nerd on the Street on YouTube, Tutorials from GOFree, TechRepublic and video tutorials from TheFrugalComputerGuy.
Calc is the spreadsheet application for LibreOffice and offers flexible cell formatting options, multiple user support, security for files, over one million rows of data (if you need that many in one spreadsheet), plenty of mathematical functions and easy formula creation. Cross-tabulate, summarize, and convert raw data from other sources. Use templates (even those designed for other spreadsheet applications), wizards and more. There is even an Intelligent Sum button that inserts a sum function or subtotal, depending on the context.
See the Calc Homepage, Array Formulas and Functions Tutorial on YouTube, tutorials from GOFree, SmartChicago, Spreadsheet Beginners Tutorial from DCP WEB on YouTube and video tutorials from TheFrugalComputerGuy.
See the Impress Homepage, the Beginner's Guide from the ThoughtCo., an Impress tutorial from GOFree and video tutorials from TheFrugalComputerGuy. Download pre-made templates from Brainy Betty, Chich-Hao Tsai, ETC Presentation, Guide2Office, Marcin Milkowski, Phillip Martin and Presentation Magazine.
See Writer’s Homepage, 10 Essential LibreOffice Writer Tricks from TechRepublic, tutorials from LPG Computer Fundamentals and tutorials in PDF from BVCC Schoolhouse. And/or see video tutorials; the Beginners Tutorial, the Complete Guide to Images, and video tutorials from TheFrugalComputerGuy.