EECS + Engineering student organizations at Cal

Organizations are listed within each section in rough order of size / influence / notability.

Startups, Business, and Consulting

Codebase: A former consulting club turned just coding. Pretty much a general 'coding club'. They have a consulting branch that pulls in some serious money for the org but they also run mentorship programs.
Blueprint: A smaller, non-profit oriented tech club. They partner with five non-profits each year and build them tech (mostly apps and websites) in teams of 5. Blueprint also runs the Ruby on Rails DeCal.
MDB: “Mobile developers at Berkeley”, similar to Codebase but only for mobile applications

Berkeley Innovation: “BI”, UX/HCI design club with a few DeCals
InnoD: UI oriented design club with several branches including web, photo, and graphic. May be partnered with ASUC. They also run most of the design DeCals on campus like Photoshop/Illustrator.
IDE: Imagine, Design, Engineer

ML@B: “Machine Learning @ Berkeley”, a more notable, academic club that’s pretty established
B@B: “Blockchain @ Berkeley”, The largest blockchain org at any university and one of the most notable blockchain organizations in the world right now. They have a student group that does stuff like consulting, DeCals, and hosts conferences. There are many startups and funds that have come out of B@B.
VR@B: “Virtual Reality @ Berkeley”, a pretty large organization that does all things VR, including a few DeCals
OCF: “Open Computing Facility”, runs the printing lab, all *.berkeley.edu domain hosting, and lots of student-run infrastructure and open-source projects
UCBUGG: Computer and 3D Graphics group, also runs a DeCal.
Quantum Computing: Very young, very small club dedicated to quantum computing, also runs a DeCal covering the conceptual basics of QC
Berke1337: Berkeley's premier Cyber Security club. They also run a DeCal and have a CTF team.
Robotics @ Berkeley: Robots!
LaunchPad: Like ML@B but also do computer vision and are more focused on tangible products. Club is divided into project teams where they just build things.
GameCraft at Berkeley: Game Design

UPE: CS honor society
HKN: EECS honor society (less competitive than UPE)
Codeology: Helps people get jobs and provide resources in the recruiting process
Engineering Student Council: Organizes events for the engineering community
PCS@Berkeley: Political Computer Science @ Berkeley

SWE: “Society of Women Engineers”, women in engineering
AWE: “Association of Women in EE&CS”, women in EECS
FEM Tech: Tech club for women in CS. Also hosts an intro to web DeCal that is not wdd.io (the de-facto Web Design DeCal)
BESSA: UC Berkeley's National Society of Black Engineers (NSBE) collegiate chapter
HES: Hispanic Engineers and Scientists of UC Berkeley

Hack the Bay: Runs Cal Hacks, the world’s largest collegiate hackathon, alongside CubStart, Cal Hacks Fellowship, and other related projects
ANova: Mentorship and teaching at under-resourced high schools and middle schools and teach after-school CS programs or help out with AP classes
CSUA: Community that hosts talks, hackathons, info sessions, workshops, and a biannual Startup Fair
IEEE: Local chapter of IEEE, they run a DeCal and don't have an application, anyone can join.
Code for Berkeley: Local chapter of Code for America. They help with Civil/Government projects.
DSS: Focused on education, professional development, and community building within the data science community