There are tonnes of resources, both free and affordable for Homeschool families. I have compiled a list below and update this page regularly. 
*Note-This site contains affiliate links to products. I may receive a commission for purchases made through these links at no cost to you.

For worldwide orders including the UK, the Book Depository is excellent as delivery is free in over 100 countries and sells books from major publishers like Usborne, and DK.
Book Depository
Local Bookstore in the Middle East for English and Arabic books.
Jarir Book Store
Charity shops/Thrift stores, as well as Poundland/Dollar Tree stores, have great cheap deals on books so keep an eye out!

English/Language Arts including SPELLING AND GRAMMAR
A wonderful Language Arts programme like no other which has transformed our Homeschool!*
Brave Writer-growing confident writers.
100s of free worksheets for all subjects.
No fuss, inexpensive way to teach your child how to read*
How to teach your child to read in 100 easy lessons.
100s of free worksheets for all grades.
Great to teach blending and word families.
Complete series of books, perfect for new readers.*
Bob Books
All About Spelling* is a brilliant spelling program that is particularly effective for DYSLEXIC children. However, I use this for all my children since it uses a multi-sensory approach making spelling fun and engaging!
All About Spelling
All About Reading* is a reading program that gives you all the tools you need to teach your child to read. All the work is done for you, and there are several activities to keep your child engaged.
All About Reading
Complete Grammar Program*
First Language Lessons
Make your own free handwriting sheets.
Writing Wizard
Affordable workbooks for English, Math and Science.
Schofield and Sims
Free E-books for children 3-11 (includes, Biff, Chip and Kipper series)
Oxford Owl Library
Grammar, Spelling and Comprehension worksheets for all grades.
K12 Reader
Free Spelling lists for grades 1-9
Spelling Words Well 
Colour coded magnetic letter tiles; great for all grades. 
Easy way to teach Prefixes
Easy way to teach suffixes

Math Mammoth can be purchased with US and International currencies/measurements. A great affordable option for drilling concepts.
Math Mammoth
Life of Fred Maths is a brilliant way to teach applied Math as it is taught through narrative ( Christian refs every so often.)
For Uk orders
Conquest Books
For International orders
Rainbow Resources
For Math, Science and Language Arts
Timetable practice with games and quizzes (Mute Music!)
Customizable Times Table Practice Worksheets
Times Table Generator 

Hands-on Science experiments, which younger children love.
Mystery Science
Affordable Workbooks from KS1 to KS2
Schofield and Sims

Brilliant books about famous figures and events. Great reads for adults too!
Information, games and activities.

Videos, documentaries and overall reference point.
National Geographic
Affordable Geography Curriculum, unit study style approach.
Expedition Earth
Online Encyclopedia
Brilliant short Youtube videos covering individual countries and flags.
Geography Now

Qur’an, Arabic and Islamic Studies
Beautiful resources with both free and paid subscription options.
Tonnes of free printables to help teach Islam and academics to your child.
A Muslim Homeschool
Brilliant workshops and courses for both children and mothers.
Homeschooling resources since 2002.
TJ Homeschooling
Free resources to teach youngsters the basics of Islam.
Ummahaat Resources
Wonderful resources for youngsters
Islamic Homeschool4389
Books about Tawheed and basics of Islam (faceless)
umm Assad
Juz Amma Lessons with Tajweed – YouTube playlist
Tajweed Institute 
Tafseer colouring books for Juz Amma and Juz Tabarak

Free touch typing course
Typing Club

Free Dyslexia Checklist
Symptoms of Dyslexia Screening Checklist
Free E-Book
How to make Spelling easy
Free Dyslexia resources
Activities, games and e-books plus tonnes of support

Useful information for Early Years education.
Raising the Ummah

For all subjects
Brilliant online videos, clearly explained, for all subjects and ages.
Khan Academy
Worksheets for all subjects – free and subscription options
Parents in Touch
Books from Primary-A Level revision books for all subjects. Great layout.
CGP Books

Planning and Organising
Free Printable Homeschool Planner in several colours and designs
Tina’s Dynamic Homeschool
Home Management, organisation and schedule printables

World Cuisine – We try to bake a dish from the country we are currently studying in History/Geography at the time. All tried and tested recipes will be linked below.
Spanakopita (Greek Spinach Pie)
Malawah (Sweet pancakes)
Sweet and Sour Chicken
Joojeh Chicken Kebabs
Shir Berenj (Rice pudding)
Adas Polo (Persian Rice with Lentils
South Africa
Malva Pudding
Chocolate Gelato (No Ice-cream machine needed!)