You can get all of these if you're a student. It helps to have a .edu email address

• JetBrains - a huge set of dev tools for most languages/platforms like Java, C#, Obj-C, PHP, Ruby, Python, and Ruby. They have really nice and easy-to-use IDEs like PyCharm and WebStorm that would normally cost a lot of money
• Autodesk - A set of modeling utilities for engineering students.
• GitHub Student Pack - a bunch of discounted/free stuff you can get due to company tie-ups with GitHub. Get AWS creds, DigitalOcean creds, Stripe discounts, a free .me domain, and lessons from Udacity.
• Microsoft Imagine - discounted/free .NET-based technologies like Visual Studio and SQL Server
• On The Hub - search for your school and find software that your school sponsors, often Windows 10 downloads, VMWare, etc.
• Namecheap - get a free .me domain for a year, in addition to heavily discounted other domains. Also comes with free email hosting
• Washington Post - Free unlimited digital access with .edu e-mail address
• Google Cloud for Education - get access to google cloud and credits
• Amazon Prime - get discounts on Amazon Prime
• CATIA - CATIA Student Edition
• Spotify - get discounts on Spotify
• Apple Products - get discounts on apple products upto $300
• DotTech Domains - Get a free .tech domain for a year with free hosting.
• Prezi for Students - Get a free version of Prezi to create unlimited presentations under their student plan.
• Taskade - Free real-time organization and collaboration tool for getting things done. Get additional 50% off organizational discounts for educational use and students with the discount code students50.

Your school has probably told you about these already, but here goes anyway

• IEEE Student Membership - A lot of schools give you IEEE memberships, allowing you to view some of the nation's best STEM research work for free, when it would otherwise cost you about $50 per paper.
• MATLAB - a lot of schools, especially engineering colleges, sponsor a university-wide MATLAB license, allowing you to save thousands upon thousands of dollars
• Microsoft Office - most schools sponsor free Microsoft Office for all of their students.
• Google Drive - if your school has an educational Google Apps account, you have infinite storage (technically like 10 TB) on your account. You can save everything to your heart's content on that account.
• Grammarly - Grammarly is an online grammar and spelling checker that improves communication by helping users find and correct writing mistakes. Grammarly offers education plans, where one has to signup using their organization.

Just a few schools have these

• Free Adobe Creative Cloud - some schools like UC Berkeley and Clemson have tie-ups with Adobe and can provide free Creative Cloud for their students.
• Free Atlassian tools - some schools offer popular Atlassian tools for free. They help with code reviews, bug tracking and other such things.
• Free Lynda Subscription - Sign in with organization email - provide details. Check with your school whether they have a subscription. Lynda is an amazing portal for online courses with a wide range of choices suited to meet every individual's needs.

• WebEmployed's List of 20 Free Things - A curated list of 20 software and services students can subscribe to for free.
• SaveTheStudent's List of Free Software - Another resourceful list of free software for students.