Over the last twelve months - most are rather small:
1. Amazon gift cards from the Red Cross for donating blood products
2. Spare change from the ground (found a quarter a few days ago)
3. Credit card points (usually convert to travel somehow)
4. Upside cash back ($5.13 yesterday)
5. Interest
6. Dividends
7. Capital gains
8. Credit card SUBs
9. Credit card cash back
10. My E-R.org sponsorship
11. Gifts
12. Tax refunds (some years I have a negative effective rate)
13. Working as a poll worker
14. Class action lawsuit settlements
15. USAA auto insurance dividends
16. Health insurance gift cards for gym membership which exceed the cost of my gym membership
17. Credit card piggybacking
Several of these, of course, are not technically income but are some sort of refund or rebate. The way I do Quicken though they show up as income.
Later:
18. RMDs
19. SS