Blog train

1. WordPress.org
2. WordPress.com
3. Blogger
4. Tumblr
5. Medium
6. Squarespace
7. Wix
8. Joomla
9. Ghost
10. Weebly

More Blogging Platforms

Posterous	TypePad
Movable Type	Drupal
ExpressionEngine	Open Diary
LiveJournal	Xanga
DeadJournal	Ning
Bebo	Identi.ca
Plurk	Jaiku
hi5	Tripod
PHP Nuke	Windows Live Spaces
Wheatblog	Penzu
EggBlog	FlatPress
LifeType	LoudBlog
Serendipity	Pixie
glFusion	Textpattern
BlogHarbor	Open Salon
b2evolution	Blog CMS
Blosxom	Nucleus CMS
Pivot	SPIP
Dotclear	Globber
Habari	LiveStreet
Pblog	NibbleBlog
Open Blog	PluXml
Pritlog	SweetRice
Zomplog	Croogo
Blogware	Compendium
Bloog	cpedialog
i-hereblog	Dropbox
Picoblog	Vosao
JoeyB	PinaxCombo
Project Picky	Micolog
Toon-Blog	Django Tech Blog
Byteflow	MightyLemon
Kukkaisvoima	Jeeran
Splinder	Roller
Bricolage CMS	Blogsmith
Scoop	Blog.com
BoastMachine	Super Simple Blog
Webmobo	WikyBlog
Blogr	Blogabond
Blogetery	Blogster
Multiply	vBulletin
InsaneJournal	Terapad
Tblog	Friendster
Edublogs	Wikispaces
Aeonity	Blogates
Bravenet	eHow
Google Sites	HubPages
ISeekBlog	PBWorks
Squidoo	Stikipadd
Thoughts	Jurnl
Dreamweaver	Apple's MobileMe
Oxite	Blog Engine
DasBlog	Microsoft Sharepoint
Kontain	Blogspot.es
GitWrite	Toto

WP Beginner dot com furnished that first list and John Saddington, trying to win the Internet the second. This second john do(es) win a sizable representation with this comprehensive list even feeling it has to include Twitter, MySpace and Facebook
There are still more platforms like Mephisto but I think this is a creditable effort on his part. That's why I - a sometime records management consultant, library technician and team leader of student records - have left it all in this random order.