
Here is the vol.2 of 50 PSD line icons freebie released some months ago by Davide Pacilio.
Subway is a (now free!) set of 306 pixel perfect crafted icons. Delivered in PNG, SVG, XALM, PSD, CSH, SKETCH, PDF, AI and EPS formats.
Here is a nice set made of 100 pixel-perfect line icons. Free PSD and AI files released on Creative Tail.
Here is an interesting set made of 50 line icons designed with Photoshop. Free PSD released by Davide Pacilio.
Gemicon v2.0 is a set including 40 vector icons provided in both line and solid versions. Free PSD released by Budi Tanrim.
A set of 24 random tiny icons created with Photoshop vector shapes. Free PSD designed and released by Benjamin Hawkyard.
A set of 12 outline house icons created with Photoshop vector shapes. Free PSD released by PrimeModule Studio.
Dashel is a set of 45 free icons available in SVG, PSD and PNG formats. Designed by Print Express for Smashing Magazine.