"Clarinet Fingering Charts [has a] list of all available fingering charts for Boehm-, Albert-, and Oehler-system clarinets and Kinderklarinettes. The Boehm-system clarinet is widely used in bands and orchestras, although the Oehler- and Albert-system clarinets are commonly used in some regions, such as central Europe. The fingerings generally apply to all sizes (soprano, alto, bass, and contrabass) of clarinets unless specified otherwise. Each fingering chart is split up by registers, whose ranges are notated and clickable. Trills are arranged in order by the lower, principal note."
The Petrucci Music Library at IMSLP is a great resource for all musicians.
"We at the IMSLP believe that music should be something that is easily accessible for everyone. For this purpose we have created a music library to provide music scores free of charge to anyone with internet access, with several other projects in planning. IMSLP is also entirely collaborative, and all contributions are greatly welcome."
Great handout on web resources for students and teachers created by Rachel Yoder and Kellie Lignitz while presenting at ClarinetFest 2012 in Lincoln, Nebraska.
"The International Clarinet Association is a community of clarinetists and clarinet enthusiasts that supports projects that will benefit clarinet performance; provides opportunities for the exchange of ideas, materials, and information among its members; fosters the composition, publication, recording, and distribution of music for the clarinet; encourages the research and manufacture of a more definitive clarinet; avoids commercialism in any form while encouraging communication and cooperation among clarinetists and the music industry; and encourages and promotes the performance and teaching of a wide variety of repertoire for the clarinet."