@Chris Vanderloo I'm interested to see what types of responses you see here!
I currently use dotloop for digital filing and electronic signatures. It's a great way to keep in place all the documents I need to keep a transaction together, make edits, share with any involved party, and be sure everyone has signed.
Any CRM for an investor or real estate professional is an absolute must. There's a lot of them out there, all at different price points ranging from about $10/mo to over $120/mo. Check out realvolve, contactually, less annoying, top producer, liondesk, the list goes on. A CRM that has built in email and mail marketing campaigns is a huge plus. Haven't found a good (affordable) one yet that specifically targets the multifamily/commercial space.
Marketing apps similar to dealmachine, where you can find a property and put that owner (occupied or absentee) on an automated mail campaign.
I haven't done extensive research yet, but also haven't come across anything that gives me a reliable phone number or email address of potential sellers.
Just some quick thoughts, but hope this helps :)