American Libraries Live
Live one-hour events on various library topics via Google Hangouts. Also archived. All Free.

American Library Association (ALA) Online Learning
A variety of subjects and ways to learn online (including courses, webinars, archives) for various costs.

Association of College and Research Libraries (ACRL)
ACRL Choice webinar archives. Free.

Association of Specialized and Cooperative Library Agencies (ASCLA)
Low cost online courses and webinars.

Colorado State Library - Tech Training
Technology training curriculum for library staff and the public. Free.

GCFLearnFree
Online learning modules on a variety of technology topics. Free.

InfoPeople
Archived webcasts on many different library topics including technology.  Free.

Insync Training
Experts in how to design and deliver synchronous (live) online training.  Offers some complimentary programs like "How to Learn Online". Free download on "101 Ways to Motivate the Online Learner". 

i.School Open Classes program at the San Jose State University School of Information offers 60 courses on a variety of topics with as little time as a four week commitment. There is a fee.

Library Journal
Sign up for Library Journal's Free, on-demand webcast series on data-driven solutions that will help you analyze and decode data to create viable plans for your library's future.

Library Success
Okay, this is not an online course, it is a wiki, but it is a very cool learning resource.

LYRASIS (was Palinet)
Live online courses on computer software, hardware, web site development as well as resource sharing, reference, cataloging and library administration.  Costs vary.  Free live events.

MOOCs (Massive Open Online Courses)
Here is a list of popular library MOOCs.  They are all free.

OCLC Training
Online courses in addition to classroom offerings.  Prices vary.  Free webinars.

Open Office Tutorials
Free assistance to anyone learning or teaching Open Office.  Howard County also has a great FAQ site to help you learn.

PLA Online Learning
Public Library Association (PLA) offers a variety of online learning opportunities that are reasonably priced, including very low priced on-demand webinars. Additionally, PLA offers (free) FaceBook Forums where FaceBook users can discuss a topic with an expert and other users. 

Project ENABLE
Developed by the Center for Digital Literacy at the School of Information Studies, Syracuse University, this site provides free comprehensive online training to librarians nationwide on library and information services for people with disabilities.  Learners may earn a certificate for completion of all modules and assessments worth 20 contact hours. Free.

TED Talks
"Ideas worth spreading". Although these videos are not formal library courses or webinars, they are brief and can ignite new ideas.

University of Wisconsin, Madison
Short courses offered by the School of Library & Information Studies in cooperation with a national network of educational institutions.  Free webinars.

USL Online Learning Lab
Webinar archives on a variety of library-related topics from the Utah State Library. Free.

Web Junction
WebJunction provides helpful online learning, portal and community services to a wide variety of library organizations.  It is free to browse the many topics that provide learning resources.  Live webinars and archives are also free - WebJunction Librarian Competencies and Corresponding Archived Webinars.  The new learning management system provides you with a certificate when you complete a course - all free. See the WebJunction Course Catalog.

Wyoming State Library Training Calendar
Lists available webinars from many different library vendors all in one place.

YALSA Online Courses
Young Adult Library Service Association (YALSA) provides online continuing education classes to enhance the skills of young adult librarians and teen librarians.  All of YALSA's courses are equivalent to a 1.5-day face-to-face workshop (10 contact hours).  A certificate of completion is issued for each course taken.