Ministeck join tutorial by Charami, in Dutch with charts.

Wanna know how to properly join-as-you-go hexagons?  Then moonstitches is the place for you!  What a great little tutorial.  Highly recommended.

Super cute little stars.

Joining the squares - link to video tutorial

Tutorial - how to crochet a tight join

Crochet Joining Techniques from Talking Crochet

Joining Tutorial – Tight Join

Crochet - How to achieve that woven look - Tutorial - this is very simple!

With diagram

Free patterns/diagrams ALL KIND OF CROCHET FLOWERS

Joining Granny Squares

Ravelry: Single Crochet Join-as-You-Go pattern by Marken of The Hat & I

different joining stitches in crochet!

Gorgeous: picture tutorial only

w/ diagram

With diagram

Snowflakes w/diagram

Knitree´s diagram pattern for a hexagon motif.

Flower shawl with diagrams

Great tutorial by My Rose Valley on how to join the Maybelle Squares. Three methods, the join-as- you-go, the visible join and and the visible stitch join.

Crochet Rose Diagram